From 772c3c22ad9c79d78250652d14b39ea57bca13ac Mon Sep 17 00:00:00 2001
From: adel-signal <adel@signal.org>
Date: Sun, 22 Feb 2026 23:53:57 -0800
Subject: [PATCH] Update RingRTC to 2.65.2

Co-authored-by: emir-signal <emir@signal.org>
---
 ACKNOWLEDGMENTS.md                            | 54 +++++++++----
 app/main.main.ts                              |  1 -
 package.json                                  |  2 +-
 pnpm-lock.yaml                                | 10 +--
 protos/Backups.proto                          |  2 +-
 protos/SignalService.proto                    |  2 +-
 protos/SignalStorage.proto                    |  2 +-
 ts/components/CallLinkDetails.dom.tsx         |  1 -
 ts/components/CallLinkEditModal.dom.tsx       |  6 +-
 .../CallingAdhocCallInfo.dom.stories.tsx      |  1 -
 ts/jobs/callLinkRefreshJobQueue.preload.ts    | 15 +---
 ts/services/LinkPreview.preload.ts            | 12 +--
 ts/services/backups/export.preload.ts         |  7 +-
 ts/services/backups/import.preload.ts         |  7 +-
 ts/services/calling.preload.ts                | 41 ++--------
 ts/services/storageRecordOps.preload.ts       | 16 ----
 ts/sql/Interface.std.ts                       |  5 --
 ts/sql/Server.node.ts                         |  2 -
 .../1670-drop-call-link-epoch.std.ts          | 12 +++
 ts/sql/migrations/index.node.ts               |  2 +
 ts/sql/server/callLinks.node.ts               | 77 ++++---------------
 ts/state/ducks/calling.preload.ts             | 54 +++----------
 ts/state/ducks/globalModals.preload.ts        |  1 -
 ts/state/smart/CallLinkDetails.preload.tsx    |  2 +-
 ts/state/smart/CallLinkEditModal.preload.tsx  |  3 +-
 .../backup/calling_test.preload.ts            |  2 -
 .../state/ducks/calling_test.preload.ts       | 19 ++---
 ts/test-helpers/fakeCallLink.std.ts           | 33 --------
 ts/test-node/util/callLinks_test.node.ts      |  9 +--
 ts/test-node/util/signalRoutes_test.std.ts    | 15 +---
 ts/textsecure/MessageReceiver.preload.ts      |  4 -
 ts/textsecure/messageReceiverEvents.std.ts    |  1 -
 ts/types/CallLink.std.ts                      |  7 --
 ts/util/callLinks.std.ts                      | 18 -----
 ts/util/callLinksRingrtc.node.ts              | 19 -----
 ts/util/onCallLinkUpdateSync.preload.ts       |  9 +--
 ts/util/sendCallLinkUpdateSync.preload.ts     |  4 +-
 ts/util/signalRoutes.std.ts                   | 11 +--
 ts/windows/main/phase1-ipc.preload.ts         |  7 +-
 39 files changed, 119 insertions(+), 376 deletions(-)
 create mode 100644 ts/sql/migrations/1670-drop-call-link-epoch.std.ts

diff --git a/ACKNOWLEDGMENTS.md b/ACKNOWLEDGMENTS.md
index 765eac99a7..2c5b27bb7d 100644
--- a/ACKNOWLEDGMENTS.md
+++ b/ACKNOWLEDGMENTS.md
@@ -14461,7 +14461,7 @@ For more information on this, and how to apply and follow the GNU AGPL, see
 
 ```
 
-## libsignal-account-keys 0.1.0, libsignal-core 0.1.0, mrp 2.64.1, protobuf 2.64.1, ringrtc 2.64.1, regex-aot 0.1.0, partial-default-derive 0.1.0, partial-default 0.1.0
+## libsignal-account-keys 0.1.0, libsignal-core 0.1.0, mrp 2.65.2, protobuf 2.65.2, ringrtc 2.65.2, regex-aot 0.1.0, partial-default-derive 0.1.0, partial-default 0.1.0
 
 ```
 GNU AFFERO GENERAL PUBLIC LICENSE
@@ -14702,7 +14702,7 @@ You should also get your employer (if you work as a programmer) or school, if an
 
 ```
 
-## pulldown-cmark-to-cmark 21.1.0
+## pulldown-cmark-to-cmark 22.0.0
 
 ```
                                  Apache License
@@ -15116,7 +15116,7 @@ You should also get your employer (if you work as a programmer) or school, if an
 
 ```
 
-## prost-build 0.14.1, prost-derive 0.14.1, prost-types 0.14.1, prost 0.14.1
+## prost-build 0.14.3, prost-derive 0.14.3, prost-types 0.14.3, prost 0.14.3
 
 ```
                               Apache License
@@ -15692,7 +15692,7 @@ SOFTWARE.
 
 ```
 
-## cc 1.2.51, cfg-if 1.0.4, cmake 0.1.57, find-msvc-tools 0.1.6, pkg-config 0.3.32
+## cc 1.2.54, cfg-if 1.0.4, cmake 0.1.57, find-msvc-tools 0.1.8, pkg-config 0.3.32
 
 ```
 Copyright (c) 2014 Alex Crichton
@@ -15754,7 +15754,7 @@ DEALINGS IN THE SOFTWARE.
 
 ```
 
-## base64ct 1.8.2
+## base64ct 1.8.3
 
 ```
 Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com)
@@ -15817,7 +15817,7 @@ DEALINGS IN THE SOFTWARE.
 
 ```
 
-## uuid 1.19.0
+## uuid 1.20.0
 
 ```
 Copyright (c) 2014 The Rust Project Developers
@@ -15849,7 +15849,7 @@ DEALINGS IN THE SOFTWARE.
 
 ```
 
-## libc 0.2.179
+## libc 0.2.180
 
 ```
 Copyright (c) 2014-2020 The Rust Project Developers
@@ -15906,7 +15906,7 @@ THE SOFTWARE.
 
 ```
 
-## either 1.15.0, itertools 0.14.0, petgraph 0.7.1, serde_with 3.16.1, serde_with_macros 3.16.1
+## either 1.15.0, itertools 0.14.0, petgraph 0.8.3, serde_with 3.16.1, serde_with_macros 3.16.1
 
 ```
 Copyright (c) 2015
@@ -16194,7 +16194,7 @@ DEALINGS IN THE SOFTWARE.
 
 ```
 
-## hashbrown 0.16.1
+## hashbrown 0.15.5, hashbrown 0.16.1
 
 ```
 Copyright (c) 2016 Amanieu d'Antras
@@ -16629,7 +16629,7 @@ DEALINGS IN THE SOFTWARE.
 
 ```
 
-## getrandom 0.2.16
+## getrandom 0.2.17
 
 ```
 Copyright (c) 2018-2024 The rust-random Project Developers
@@ -17111,7 +17111,7 @@ SOFTWARE.
 
 ```
 
-## rand 0.8.5, rand 0.9.2, rand_chacha 0.3.1, rand_chacha 0.9.0, rand_core 0.6.4, rand_core 0.9.3
+## rand 0.8.5, rand 0.9.2, rand_chacha 0.3.1, rand_chacha 0.9.0, rand_core 0.6.4, rand_core 0.9.5
 
 ```
 Copyright 2018 Developers of the Rand project
@@ -17143,7 +17143,7 @@ DEALINGS IN THE SOFTWARE.
 
 ```
 
-## zerocopy-derive 0.8.33, zerocopy 0.8.33
+## zerocopy-derive 0.8.34, zerocopy 0.8.34
 
 ```
 Copyright 2023 The Fuchsia Authors
@@ -17310,7 +17310,7 @@ SOFTWARE.
 
 ```
 
-## const-str 0.6.4
+## const-str 1.0.0
 
 ```
 MIT License
@@ -17413,7 +17413,7 @@ SOFTWARE.
 
 ```
 
-## curve25519-dalek-derive 0.1.1, anyhow 1.0.100, displaydoc 0.2.5, fastrand 2.3.0, home 0.5.12, itoa 1.0.17, linkme-impl 0.3.35, linkme 0.3.35, linux-raw-sys 0.11.0, linux-raw-sys 0.4.15, num_enum 0.7.5, num_enum_derive 0.7.5, once_cell 1.21.3, prettyplease 0.2.37, proc-macro-crate 3.4.0, proc-macro2 1.0.105, quote 1.0.43, rustix 0.38.44, rustix 1.1.3, rustversion 1.0.22, semver 1.0.27, send_wrapper 0.6.0, serde 1.0.228, serde_core 1.0.228, serde_derive 1.0.228, serde_json 1.0.149, syn 2.0.114, thiserror-impl 1.0.69, thiserror-impl 2.0.17, thiserror 1.0.69, thiserror 2.0.17, unicode-ident 1.0.22, zmij 1.0.12
+## curve25519-dalek-derive 0.1.1, anyhow 1.0.100, displaydoc 0.2.5, fastrand 2.3.0, home 0.5.12, itoa 1.0.17, linkme-impl 0.3.35, linkme 0.3.35, linux-raw-sys 0.11.0, linux-raw-sys 0.4.15, num_enum 0.7.5, num_enum_derive 0.7.5, once_cell 1.21.3, prettyplease 0.2.37, proc-macro-crate 3.4.0, proc-macro2 1.0.106, quote 1.0.44, rustix 0.38.44, rustix 1.1.3, rustversion 1.0.22, semver 1.0.27, send_wrapper 0.6.0, serde 1.0.228, serde_core 1.0.228, serde_derive 1.0.228, serde_json 1.0.149, syn 2.0.114, thiserror-impl 1.0.69, thiserror-impl 2.0.18, thiserror 1.0.69, thiserror 2.0.18, unicode-ident 1.0.22, zmij 1.0.17
 
 ```
 Permission is hereby granted, free of charge, to any
@@ -17901,7 +17901,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 ```
 
-## hpke-rs-crypto 0.3.0, hpke-rs 0.4.0
+## hpke-rs-crypto 0.4.0, hpke-rs 0.5.0
 
 ```
 Mozilla Public License Version 2.0
@@ -18325,6 +18325,30 @@ authorization of the copyright holder.
 
 ```
 
+## foldhash 0.1.5
+
+```
+Copyright (c) 2024 Orson Peters
+
+This software is provided 'as-is', without any express or implied warranty. In
+no event will the authors be held liable for any damages arising from the use of
+this software.
+
+Permission is granted to anyone to use this software for any purpose, including
+commercial applications, and to alter it and redistribute it freely, subject to
+the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim
+    that you wrote the original software. If you use this software in a product,
+    an acknowledgment in the product documentation would be appreciated but is
+    not required.
+
+2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source distribution.
+```
+
 ## webrtc
 
 ```
diff --git a/app/main.main.ts b/app/main.main.ts
index 89a89736a6..fe3a4b9a83 100644
--- a/app/main.main.ts
+++ b/app/main.main.ts
@@ -3044,7 +3044,6 @@ function handleSignalRoute(route: ParsedSignalRoute) {
   } else if (route.key === 'linkCall') {
     mainWindow.webContents.send('start-call-link', {
       key: route.args.key,
-      epoch: route.args.epoch,
     });
   } else if (route.key === 'showWindow') {
     mainWindow.webContents.send('show-window');
diff --git a/package.json b/package.json
index 1536540463..d2d73c32ef 100644
--- a/package.json
+++ b/package.json
@@ -137,7 +137,7 @@
     "@signalapp/minimask": "1.0.1",
     "@signalapp/mute-state-change": "workspace:1.0.0",
     "@signalapp/quill-cjs": "2.1.2",
-    "@signalapp/ringrtc": "2.64.1",
+    "@signalapp/ringrtc": "2.65.2",
     "@signalapp/sqlcipher": "2.4.4",
     "@signalapp/windows-ucv": "1.0.1",
     "@tanstack/react-virtual": "3.11.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 63fb766e56..90cdec25a0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -138,8 +138,8 @@ importers:
         specifier: 2.1.2
         version: 2.1.2
       '@signalapp/ringrtc':
-        specifier: 2.64.1
-        version: 2.64.1
+        specifier: 2.65.2
+        version: 2.65.2
       '@signalapp/sqlcipher':
         specifier: 2.4.4
         version: 2.4.4
@@ -3502,8 +3502,8 @@ packages:
     resolution: {integrity: sha512-y2sgqdivlrG41J4Zvt/82xtH/PZjDlgItqlD2g/Cv3ZbjlR6cGhTNXbfNygCJB8nXj+C7I28pjt1Zm3k0pv2mg==}
     engines: {npm: '>=8.2.3'}
 
-  '@signalapp/ringrtc@2.64.1':
-    resolution: {integrity: sha512-vQTBWTgukSuZ6yvzUJYQa++s7842D2yssAp/HLMqlqnTxViVE2dvR9urk7srFbdSbmMytmYXhjRgk6ZrvrgRMQ==}
+  '@signalapp/ringrtc@2.65.2':
+    resolution: {integrity: sha512-/gjEnGpDZre7V6Q23oN+5tphXRBHs+LLJT2eVyZmL6oNhjg2q26kE8x/dYBpLPKvhN6vlALjv2tuRRqgThyBvQ==}
     hasBin: true
 
   '@signalapp/sqlcipher@2.4.4':
@@ -14310,7 +14310,7 @@ snapshots:
       lodash: 4.17.21
       quill-delta: 5.1.0
 
-  '@signalapp/ringrtc@2.64.1':
+  '@signalapp/ringrtc@2.65.2':
     dependencies:
       https-proxy-agent: 7.0.6
       tar: 7.5.2
diff --git a/protos/Backups.proto b/protos/Backups.proto
index c28e018104..6345fdafe1 100644
--- a/protos/Backups.proto
+++ b/protos/Backups.proto
@@ -411,7 +411,7 @@ message CallLink {
   string name = 3;
   Restrictions restrictions = 4;
   uint64 expirationMs = 5;
-  optional bytes epoch = 6; // May be absent/empty for older links
+  reserved 6; // was epoch, never used
 }
 
 message AdHocCall {
diff --git a/protos/SignalService.proto b/protos/SignalService.proto
index b353b124e8..dc5b4688a8 100644
--- a/protos/SignalService.proto
+++ b/protos/SignalService.proto
@@ -737,7 +737,7 @@ message SyncMessage {
     optional bytes rootKey = 1;
     optional bytes adminPasskey = 2;
     optional Type type = 3; // defaults to UPDATE
-    optional bytes epoch = 4;
+    reserved 4; // was epoch, never used
   }
 
   message CallLogEvent {
diff --git a/protos/SignalStorage.proto b/protos/SignalStorage.proto
index dc0ba48f61..3c3c20c602 100644
--- a/protos/SignalStorage.proto
+++ b/protos/SignalStorage.proto
@@ -340,7 +340,7 @@ message CallLinkRecord {
   bytes adminPasskey = 2; // Non-empty when the current user is an admin
   uint64 deletedAtTimestampMs = 3; // When present and non-zero, `adminPasskey`
                                    // should be cleared
-  optional bytes epoch = 4;
+  reserved 4; // was epoch, never used
 }
 
 message Recipient {
diff --git a/ts/components/CallLinkDetails.dom.tsx b/ts/components/CallLinkDetails.dom.tsx
index 54a8ab6a53..24e5e1962a 100644
--- a/ts/components/CallLinkDetails.dom.tsx
+++ b/ts/components/CallLinkDetails.dom.tsx
@@ -70,7 +70,6 @@ export function CallLinkDetails({
 
   const webUrl = linkCallRoute.toWebUrl({
     key: callLink.rootKey,
-    epoch: callLink.epoch,
   });
   const joinButton = (
     <Button
diff --git a/ts/components/CallLinkEditModal.dom.tsx b/ts/components/CallLinkEditModal.dom.tsx
index 87c276b935..c42dd6fb9e 100644
--- a/ts/components/CallLinkEditModal.dom.tsx
+++ b/ts/components/CallLinkEditModal.dom.tsx
@@ -93,10 +93,8 @@ export function CallLinkEditModal({
   const [restrictionsId] = useState(() => generateUuid());
 
   const callLinkWebUrl = useMemo(() => {
-    return linkCallRoute
-      .toWebUrl({ key: callLink.rootKey, epoch: callLink.epoch })
-      .toString();
-  }, [callLink.rootKey, callLink.epoch]);
+    return linkCallRoute.toWebUrl({ key: callLink.rootKey }).toString();
+  }, [callLink.rootKey]);
 
   const joinButton = (
     <Button
diff --git a/ts/components/CallingAdhocCallInfo.dom.stories.tsx b/ts/components/CallingAdhocCallInfo.dom.stories.tsx
index 60cc850cfe..82d8aa102b 100644
--- a/ts/components/CallingAdhocCallInfo.dom.stories.tsx
+++ b/ts/components/CallingAdhocCallInfo.dom.stories.tsx
@@ -54,7 +54,6 @@ function getCallLink(overrideProps: Partial<CallLinkType> = {}): CallLinkType {
   return {
     roomId: 'abcd1234abcd1234abcd1234abcd1234abcd1234',
     rootKey: 'abcd-abcd-abcd-abcd-abcd-abcd-abcd-abcd',
-    epoch: null,
     adminKey: null,
     name: 'Axolotl Discuss',
     restrictions: CallLinkRestrictions.None,
diff --git a/ts/jobs/callLinkRefreshJobQueue.preload.ts b/ts/jobs/callLinkRefreshJobQueue.preload.ts
index 740915094d..a8bad28f59 100644
--- a/ts/jobs/callLinkRefreshJobQueue.preload.ts
+++ b/ts/jobs/callLinkRefreshJobQueue.preload.ts
@@ -3,7 +3,7 @@
 
 import * as z from 'zod';
 import PQueue from 'p-queue';
-import { CallLinkRootKey, CallLinkEpoch } from '@signalapp/ringrtc';
+import { CallLinkRootKey } from '@signalapp/ringrtc';
 import { createLogger } from '../logging/log.std.js';
 import type { LoggerType } from '../types/Logging.std.js';
 import { exponentialBackoffMaxAttempts } from '../util/exponentialBackoff.std.js';
@@ -38,7 +38,6 @@ const DEFAULT_SLEEP_TIME = 20 * SECOND;
 // the call link is confirmed valid on the calling server.
 const callLinkRefreshJobDataSchema = z.object({
   rootKey: z.string(),
-  epoch: z.string().nullable().optional(),
   adminKey: z.string().nullable().optional(),
   storageID: z.string().nullable().optional(),
   storageVersion: z.number().int().nullable().optional(),
@@ -83,13 +82,11 @@ export class CallLinkRefreshJobQueue extends JobQueue<CallLinkRefreshJobData> {
       storageVersion,
       storageUnknownFields,
       rootKey,
-      epoch,
       adminKey,
     } = parsedData ?? {};
     if (storageID && storageVersion && rootKey) {
       this.#pendingCallLinks.set(rootKey, {
         rootKey,
-        epoch: epoch ?? null,
         adminKey: adminKey ?? null,
         storageID: storageID ?? undefined,
         storageVersion: storageVersion ?? undefined,
@@ -168,9 +165,8 @@ export class CallLinkRefreshJobQueue extends JobQueue<CallLinkRefreshJobData> {
     }: Readonly<{ data: CallLinkRefreshJobData; timestamp: number }>,
     { attempt, log }: Readonly<{ attempt: number; log: LoggerType }>
   ): Promise<typeof JOB_STATUS.NEEDS_RETRY | undefined> {
-    const { rootKey, epoch, source } = data;
+    const { rootKey, source } = data;
     const callLinkRootKey = CallLinkRootKey.parse(rootKey);
-    const callLinkEpoch = epoch ? CallLinkEpoch.parse(epoch) : undefined;
     const roomId = getRoomIdFromRootKey(callLinkRootKey);
 
     const logId = `callLinkRefreshJobQueue(${roomId}, source=${source}).run`;
@@ -191,10 +187,7 @@ export class CallLinkRefreshJobQueue extends JobQueue<CallLinkRefreshJobData> {
     try {
       // This will either return the fresh call link state,
       // null (link deleted from server), or err (connection error)
-      const freshCallLinkState = await calling.readCallLink(
-        callLinkRootKey,
-        callLinkEpoch
-      );
+      const freshCallLinkState = await calling.readCallLink(callLinkRootKey);
       const existingCallLink = await DataReader.getCallLinkByRoomId(roomId);
 
       if (freshCallLinkState != null) {
@@ -218,7 +211,6 @@ export class CallLinkRefreshJobQueue extends JobQueue<CallLinkRefreshJobData> {
             ...freshCallLinkState,
             roomId,
             rootKey,
-            epoch: epoch ?? null,
             adminKey: adminKey ?? null,
             ...storageFields,
             storageNeedsSync: false,
@@ -247,7 +239,6 @@ export class CallLinkRefreshJobQueue extends JobQueue<CallLinkRefreshJobData> {
         await DataWriter.insertDefunctCallLink({
           roomId,
           rootKey,
-          epoch: data.epoch ?? null,
           adminKey: data.adminKey ?? null,
           ...storageFields,
           storageNeedsSync: false,
diff --git a/ts/services/LinkPreview.preload.ts b/ts/services/LinkPreview.preload.ts
index 5beba8ef16..6aa52e244b 100644
--- a/ts/services/LinkPreview.preload.ts
+++ b/ts/services/LinkPreview.preload.ts
@@ -3,7 +3,7 @@
 
 import lodash from 'lodash';
 
-import { CallLinkRootKey, CallLinkEpoch } from '@signalapp/ringrtc';
+import { CallLinkRootKey } from '@signalapp/ringrtc';
 import type { LinkPreviewWithHydratedData } from '../types/message/LinkPreviews.std.js';
 import type {
   LinkPreviewImage,
@@ -41,7 +41,7 @@ import { maybeParseUrl } from '../util/url.std.js';
 import { sniffImageMimeType } from '../util/sniffImageMimeType.std.js';
 import { drop } from '../util/drop.std.js';
 import { calling } from './calling.preload.js';
-import { getKeyAndEpochFromCallLink } from '../util/callLinks.std.js';
+import { getKeyFromCallLink } from '../util/callLinks.std.js';
 import { getRoomIdFromCallLink } from '../util/callLinksRingrtc.node.js';
 import {
   fetchLinkPreviewImage,
@@ -593,13 +593,9 @@ async function getCallLinkPreview(
   url: string,
   _abortSignal: Readonly<AbortSignal>
 ): Promise<null | LinkPreviewResult> {
-  const { key, epoch } = getKeyAndEpochFromCallLink(url);
+  const key = getKeyFromCallLink(url);
   const callLinkRootKey = CallLinkRootKey.parse(key);
-  const callLinkEpoch = epoch ? CallLinkEpoch.parse(epoch) : undefined;
-  const callLinkState = await calling.readCallLink(
-    callLinkRootKey,
-    callLinkEpoch
-  );
+  const callLinkState = await calling.readCallLink(callLinkRootKey);
   if (callLinkState == null || callLinkState.revoked) {
     return null;
   }
diff --git a/ts/services/backups/export.preload.ts b/ts/services/backups/export.preload.ts
index bf6ca2c964..b002167ccc 100644
--- a/ts/services/backups/export.preload.ts
+++ b/ts/services/backups/export.preload.ts
@@ -155,10 +155,7 @@ import {
   isCallHistoryForUnusedCallLink,
   toAdminKeyBytes,
 } from '../../util/callLinks.std.js';
-import {
-  getRoomIdFromRootKey,
-  toEpochBytes,
-} from '../../util/callLinksRingrtc.node.js';
+import { getRoomIdFromRootKey } from '../../util/callLinksRingrtc.node.js';
 import { SeenStatus } from '../../MessageSeenStatus.std.js';
 import { migrateAllMessages } from '../../messages/migrateMessageData.preload.js';
 import {
@@ -511,7 +508,6 @@ export class BackupExportStream extends Readable {
     for (const link of callLinks) {
       const {
         rootKey: rootKeyString,
-        epoch,
         adminKey,
         name,
         restrictions,
@@ -534,7 +530,6 @@ export class BackupExportStream extends Readable {
           id: Long.fromNumber(id),
           callLink: {
             rootKey: rootKey.bytes,
-            epoch: epoch ? toEpochBytes(epoch) : null,
             adminKey: adminKey ? toAdminKeyBytes(adminKey) : null,
             name,
             restrictions: toCallLinkRestrictionsProto(restrictions),
diff --git a/ts/services/backups/import.preload.ts b/ts/services/backups/import.preload.ts
index 5769117261..4d12e1b753 100644
--- a/ts/services/backups/import.preload.ts
+++ b/ts/services/backups/import.preload.ts
@@ -134,10 +134,7 @@ import {
   fromAdminKeyBytes,
   toCallHistoryFromUnusedCallLink,
 } from '../../util/callLinks.std.js';
-import {
-  getRoomIdFromRootKey,
-  fromEpochBytes,
-} from '../../util/callLinksRingrtc.node.js';
+import { getRoomIdFromRootKey } from '../../util/callLinksRingrtc.node.js';
 import { loadAllAndReinitializeRedux } from '../allLoaders.preload.js';
 import {
   startBackupMediaDownload,
@@ -1451,7 +1448,6 @@ export class BackupImportStream extends Writable {
   ): Promise<void> {
     const {
       rootKey: rootKeyBytes,
-      epoch,
       adminKey,
       name,
       restrictions,
@@ -1466,7 +1462,6 @@ export class BackupImportStream extends Writable {
     const callLink: CallLinkType = {
       roomId: getRoomIdFromRootKey(rootKey),
       rootKey: rootKey.toString(),
-      epoch: epoch?.length ? fromEpochBytes(epoch) : null,
       adminKey: adminKey?.length ? fromAdminKeyBytes(adminKey) : null,
       name,
       restrictions: fromCallLinkRestrictionsProto(restrictions),
diff --git a/ts/services/calling.preload.ts b/ts/services/calling.preload.ts
index 904bc7edf4..74afdf69d1 100644
--- a/ts/services/calling.preload.ts
+++ b/ts/services/calling.preload.ts
@@ -20,7 +20,6 @@ import {
   CallingMessage,
   CallMessageUrgency,
   CallLinkRootKey,
-  CallLinkEpoch,
   CallLogLevel,
   CallState,
   CallEndReason,
@@ -863,13 +862,12 @@ export class CallingClass {
     }
 
     log.info(`${logId}: success`);
-    const { epoch } = result.value;
     const state = callLinkStateFromRingRTC(result.value);
+    const maybeUpdatedRootKey = result.value.rootKey.toString();
 
     const callLink: CallLinkType = {
       roomId: roomIdHex,
-      rootKey: rootKey.toString(),
-      epoch: epoch ? epoch.toString() : null,
+      rootKey: maybeUpdatedRootKey,
       adminKey: Bytes.toBase64(adminKey),
       storageNeedsSync: true,
       ...state,
@@ -891,9 +889,6 @@ export class CallingClass {
     log.info(logId);
 
     const callLinkRootKey = CallLinkRootKey.parse(callLink.rootKey);
-    const callLinkEpoch = callLink.epoch
-      ? CallLinkEpoch.parse(callLink.epoch)
-      : undefined;
     strictAssert(callLink.adminKey, 'Missing admin key');
     const callLinkAdminKey = toAdminKeyBytes(callLink.adminKey);
     const authCredentialPresentation =
@@ -903,7 +898,6 @@ export class CallingClass {
       sfuUrl,
       authCredentialPresentation.serialize(),
       callLinkRootKey,
-      callLinkEpoch,
       callLinkAdminKey
     );
 
@@ -932,9 +926,6 @@ export class CallingClass {
     log.info(`${logId}: Updating call link name`);
 
     const callLinkRootKey = CallLinkRootKey.parse(callLink.rootKey);
-    const callLinkEpoch = callLink.epoch
-      ? CallLinkEpoch.parse(callLink.epoch)
-      : undefined;
     strictAssert(callLink.adminKey, 'Missing admin key');
     const callLinkAdminKey = toAdminKeyBytes(callLink.adminKey);
     const authCredentialPresentation =
@@ -943,7 +934,6 @@ export class CallingClass {
       sfuUrl,
       authCredentialPresentation.serialize(),
       callLinkRootKey,
-      callLinkEpoch,
       callLinkAdminKey,
       name
     );
@@ -974,9 +964,6 @@ export class CallingClass {
     log.info(`${logId}: Updating call link restrictions`);
 
     const callLinkRootKey = CallLinkRootKey.parse(callLink.rootKey);
-    const callLinkEpoch = callLink.epoch
-      ? CallLinkEpoch.parse(callLink.epoch)
-      : undefined;
     strictAssert(callLink.adminKey, 'Missing admin key');
     const callLinkAdminKey = toAdminKeyBytes(callLink.adminKey);
     const authCredentialPresentation =
@@ -992,7 +979,6 @@ export class CallingClass {
       sfuUrl,
       authCredentialPresentation.serialize(),
       callLinkRootKey,
-      callLinkEpoch,
       callLinkAdminKey,
       newRestrictions
     );
@@ -1010,8 +996,7 @@ export class CallingClass {
   }
 
   async readCallLink(
-    callLinkRootKey: CallLinkRootKey,
-    callLinkEpoch: CallLinkEpoch | undefined
+    callLinkRootKey: CallLinkRootKey
   ): Promise<CallLinkStateType | null> {
     if (!this._sfuUrl) {
       throw new Error('readCallLink() missing SFU URL; not handling call link');
@@ -1027,8 +1012,7 @@ export class CallingClass {
     const result = await RingRTC.readCallLink(
       this._sfuUrl,
       authCredentialPresentation.serialize(),
-      callLinkRootKey,
-      callLinkEpoch
+      callLinkRootKey
     );
     if (!result.success) {
       log.warn(`${logId}: failed with status ${result.errorStatusCode}`);
@@ -1044,13 +1028,11 @@ export class CallingClass {
 
   async startCallLinkLobby({
     callLinkRootKey,
-    callLinkEpoch,
     adminPasskey,
     hasLocalAudio,
     preferLocalVideo = true,
   }: Readonly<{
     callLinkRootKey: CallLinkRootKey;
-    callLinkEpoch: CallLinkEpoch | undefined;
     adminPasskey: Uint8Array | undefined;
     hasLocalAudio: boolean;
     preferLocalVideo?: boolean;
@@ -1094,7 +1076,6 @@ export class CallingClass {
       roomId,
       authCredentialPresentation,
       callLinkRootKey,
-      callLinkEpoch,
       adminPasskey,
       endorsementsPublicKey,
     });
@@ -1309,8 +1290,7 @@ export class CallingClass {
 
   public async peekCallLinkCall(
     roomId: string,
-    rootKey: string | undefined,
-    epoch: string | undefined
+    rootKey: string | undefined
   ): Promise<PeekInfo> {
     log.info(`peekCallLinkCall: For roomId ${roomId}`);
     const statefulPeekInfo = this.#getGroupCall(roomId)?.getPeekInfo();
@@ -1329,15 +1309,13 @@ export class CallingClass {
     }
 
     const callLinkRootKey = CallLinkRootKey.parse(rootKey);
-    const callLinkEpoch = epoch ? CallLinkEpoch.parse(epoch) : undefined;
     const authCredentialPresentation =
       await getCallLinkAuthCredentialPresentation(callLinkRootKey);
 
     const result = await RingRTC.peekCallLinkCall(
       this._sfuUrl,
       authCredentialPresentation.serialize(),
-      callLinkRootKey,
-      callLinkEpoch
+      callLinkRootKey
     );
     if (!result.success) {
       throw new Error(
@@ -1437,14 +1415,12 @@ export class CallingClass {
     roomId,
     authCredentialPresentation,
     callLinkRootKey,
-    callLinkEpoch,
     adminPasskey,
     endorsementsPublicKey,
   }: {
     roomId: string;
     authCredentialPresentation: CallLinkAuthCredentialPresentation;
     callLinkRootKey: CallLinkRootKey;
-    callLinkEpoch: CallLinkEpoch | undefined;
     adminPasskey: Uint8Array | undefined;
     endorsementsPublicKey: Uint8Array;
   }): GroupCall {
@@ -1473,7 +1449,6 @@ export class CallingClass {
       endorsementsPublicKey,
       authCredentialPresentation.serialize(),
       callLinkRootKey,
-      callLinkEpoch,
       adminPasskey,
       new Uint8Array(),
       AUDIO_LEVEL_INTERVAL_MS,
@@ -1883,14 +1858,12 @@ export class CallingClass {
   public async joinCallLinkCall({
     roomId,
     rootKey,
-    epoch,
     adminKey,
     hasLocalAudio,
     hasLocalVideo,
   }: {
     roomId: string;
     rootKey: string;
-    epoch: string | undefined;
     adminKey: string | undefined;
     hasLocalAudio: boolean;
     hasLocalVideo: boolean;
@@ -1910,7 +1883,6 @@ export class CallingClass {
     muteStateChange.setIsMuted(!hasLocalAudio);
 
     const callLinkRootKey = CallLinkRootKey.parse(rootKey);
-    const callLinkEpoch = epoch ? CallLinkEpoch.parse(epoch) : undefined;
     const authCredentialPresentation =
       await getCallLinkAuthCredentialPresentation(callLinkRootKey);
     const adminPasskey = adminKey ? toAdminKeyBytes(adminKey) : undefined;
@@ -1924,7 +1896,6 @@ export class CallingClass {
       roomId,
       authCredentialPresentation,
       callLinkRootKey,
-      callLinkEpoch,
       adminPasskey,
       endorsementsPublicKey,
     });
diff --git a/ts/services/storageRecordOps.preload.ts b/ts/services/storageRecordOps.preload.ts
index 160f8a6690..02ebd97a24 100644
--- a/ts/services/storageRecordOps.preload.ts
+++ b/ts/services/storageRecordOps.preload.ts
@@ -73,11 +73,9 @@ import type {
 } from '../types/CallLink.std.js';
 import {
   callLinkFromRecord,
-  fromEpochBytes,
   fromRootKeyBytes,
   getRoomIdFromRootKeyString,
   toRootKeyBytes,
-  toEpochBytes,
 } from '../util/callLinksRingrtc.node.js';
 import { fromAdminKeyBytes, toAdminKeyBytes } from '../util/callLinks.std.js';
 import { isOlderThan } from '../util/timestamp.std.js';
@@ -806,9 +804,6 @@ export function toCallLinkRecord(
       'toCallLinkRecord: no adminPasskey'
     );
     callLinkRecord.adminPasskey = callLinkDbRecord.adminKey;
-    if (callLinkDbRecord.epoch) {
-      callLinkRecord.epoch = callLinkDbRecord.epoch;
-    }
   }
 
   if (callLinkDbRecord.storageUnknownFields) {
@@ -827,7 +822,6 @@ export function toDefunctOrPendingCallLinkRecord(
   const adminKey = callLink.adminKey
     ? toAdminKeyBytes(callLink.adminKey)
     : null;
-  const epoch = callLink.epoch ? toEpochBytes(callLink.epoch) : null;
 
   strictAssert(rootKey, 'toDefunctOrPendingCallLinkRecord: no rootKey');
   strictAssert(adminKey, 'toDefunctOrPendingCallLinkRecord: no adminPasskey');
@@ -837,10 +831,6 @@ export function toDefunctOrPendingCallLinkRecord(
   callLinkRecord.rootKey = rootKey;
   callLinkRecord.adminPasskey = adminKey;
 
-  if (epoch) {
-    callLinkRecord.epoch = epoch;
-  }
-
   if (callLink.storageUnknownFields) {
     callLinkRecord.$unknownFields = fromStorageUnknownFields(
       callLink.storageUnknownFields
@@ -2397,9 +2387,6 @@ export async function mergeCallLinkRecord(
   }
 
   const rootKeyString = fromRootKeyBytes(callLinkRecord.rootKey);
-  const epochString = callLinkRecord.epoch
-    ? fromEpochBytes(callLinkRecord.epoch)
-    : null;
   const adminKeyString = callLinkRecord.adminPasskey
     ? fromAdminKeyBytes(callLinkRecord.adminPasskey)
     : null;
@@ -2432,7 +2419,6 @@ export async function mergeCallLinkRecord(
   const callLinkDbRecord: CallLinkRecord = {
     roomId,
     rootKey: callLinkRecord.rootKey,
-    epoch: callLinkRecord.epoch ?? null,
     adminKey: callLinkRecord.adminPasskey ?? null,
     name: localCallLinkDbRecord?.name ?? '',
     restrictions: localCallLinkDbRecord?.restrictions ?? 0,
@@ -2476,7 +2462,6 @@ export async function mergeCallLinkRecord(
         callLinkRefreshJobQueue.add({
           rootKey: callLink.rootKey,
           adminKey: callLink.adminKey,
-          epoch: callLink.epoch,
           storageID: callLink.storageID,
           storageVersion: callLink.storageVersion,
           storageUnknownFields: callLink.storageUnknownFields,
@@ -2528,7 +2513,6 @@ export async function mergeCallLinkRecord(
   } else {
     window.reduxActions.calling.handleCallLinkUpdate({
       rootKey: rootKeyString,
-      epoch: epochString,
       adminKey: adminKeyString,
     });
   }
diff --git a/ts/sql/Interface.std.ts b/ts/sql/Interface.std.ts
index 7b5038d03f..031ad9dfa9 100644
--- a/ts/sql/Interface.std.ts
+++ b/ts/sql/Interface.std.ts
@@ -1244,11 +1244,6 @@ type WritableInterface = {
     roomId: string,
     callLinkState: CallLinkStateType
   ): CallLinkType;
-  updateCallLinkStateAndEpoch(
-    roomId: string,
-    callLinkState: CallLinkStateType,
-    epoch: string | null
-  ): CallLinkType;
   beginDeleteAllCallLinks(): boolean;
   beginDeleteCallLink(roomId: string): boolean;
   deleteCallHistoryByRoomId(roomid: string): void;
diff --git a/ts/sql/Server.node.ts b/ts/sql/Server.node.ts
index 365a97cb4a..70111fadaa 100644
--- a/ts/sql/Server.node.ts
+++ b/ts/sql/Server.node.ts
@@ -228,7 +228,6 @@ import {
   insertOrUpdateCallLinkFromSync,
   updateCallLink,
   updateCallLinkState,
-  updateCallLinkStateAndEpoch,
   updateDefunctCallLink,
 } from './server/callLinks.node.js';
 import {
@@ -671,7 +670,6 @@ export const DataWriter: ServerWritableInterface = {
   insertOrUpdateCallLinkFromSync,
   updateCallLink,
   updateCallLinkState,
-  updateCallLinkStateAndEpoch,
   beginDeleteAllCallLinks,
   beginDeleteCallLink,
   deleteCallHistoryByRoomId,
diff --git a/ts/sql/migrations/1670-drop-call-link-epoch.std.ts b/ts/sql/migrations/1670-drop-call-link-epoch.std.ts
new file mode 100644
index 0000000000..d6363d0c1f
--- /dev/null
+++ b/ts/sql/migrations/1670-drop-call-link-epoch.std.ts
@@ -0,0 +1,12 @@
+// Copyright 2025 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+import type { WritableDB } from '../Interface.std.js';
+import { sql } from '../util.std.js';
+
+export default function updateToSchemaVersion1670(db: WritableDB): void {
+  const [query] = sql`
+    ALTER TABLE callLinks DROP COLUMN epoch;
+    ALTER TABLE defunctCallLinks DROP COLUMN epoch;
+  `;
+  db.exec(query);
+}
diff --git a/ts/sql/migrations/index.node.ts b/ts/sql/migrations/index.node.ts
index 4e1ed1c826..755f4699c6 100644
--- a/ts/sql/migrations/index.node.ts
+++ b/ts/sql/migrations/index.node.ts
@@ -143,6 +143,7 @@ import updateToSchemaVersion1630 from './1630-message-pin-message-data.std.js';
 import updateToSchemaVersion1640 from './1640-key-transparency.std.js';
 import updateToSchemaVersion1650 from './1650-protected-attachments.std.js';
 import updateToSchemaVersion1660 from './1660-protected-attachments-non-unique.std.js';
+import updateToSchemaVersion1670 from './1670-drop-call-link-epoch.std.js';
 
 import { DataWriter } from '../Server.node.js';
 
@@ -1646,6 +1647,7 @@ export const SCHEMA_VERSIONS: ReadonlyArray<SchemaUpdateType> = [
   { version: 1640, update: updateToSchemaVersion1640 },
   { version: 1650, update: updateToSchemaVersion1650 },
   { version: 1660, update: updateToSchemaVersion1660 },
+  { version: 1670, update: updateToSchemaVersion1670 },
 ];
 
 export class DBVersionFromFutureError extends Error {
diff --git a/ts/sql/server/callLinks.node.ts b/ts/sql/server/callLinks.node.ts
index 05297980e3..b61996b41c 100644
--- a/ts/sql/server/callLinks.node.ts
+++ b/ts/sql/server/callLinks.node.ts
@@ -20,7 +20,6 @@ import {
   callLinkFromRecord,
   defunctCallLinkToRecord,
   defunctCallLinkFromRecord,
-  toEpochBytes,
 } from '../../util/callLinksRingrtc.node.js';
 import type { ReadableDB, WritableDB } from '../Interface.std.js';
 import { sql } from '../util.std.js';
@@ -95,7 +94,6 @@ function _insertCallLink(db: WritableDB, callLink: CallLinkType): void {
     INSERT INTO callLinks (
       roomId,
       rootKey,
-      epoch,
       adminKey,
       name,
       restrictions,
@@ -108,7 +106,6 @@ function _insertCallLink(db: WritableDB, callLink: CallLinkType): void {
     ) VALUES (
       $roomId,
       $rootKey,
-      $epoch,
       $adminKey,
       $name,
       $restrictions,
@@ -137,17 +134,14 @@ export function insertOrUpdateCallLinkFromSync(
   db: WritableDB,
   callLink: CallLinkType
 ): InsertOrUpdateCallLinkFromSyncResult {
-  const { roomId, epoch, adminKey } = callLink;
+  const { roomId, adminKey } = callLink;
   return db.transaction(() => {
     const existingCallLink = getCallLinkByRoomId(db, roomId);
     if (existingCallLink) {
-      if (
-        (adminKey && adminKey !== existingCallLink.adminKey) ||
-        epoch !== existingCallLink.epoch
-      ) {
-        updateCallLinkEpochAndAdminKeyByRoomId(db, roomId, epoch, adminKey);
+      if (adminKey && adminKey !== existingCallLink.adminKey) {
+        updateCallLinkAdminKeyByRoomId(db, roomId, adminKey);
         return {
-          callLink: { ...existingCallLink, adminKey, epoch },
+          callLink: { ...existingCallLink, adminKey },
           inserted: false,
           updated: true,
         };
@@ -175,7 +169,6 @@ export function updateCallLink(db: WritableDB, callLink: CallLinkType): void {
     `
     UPDATE callLinks
     SET
-      epoch = $epoch,
       adminKey = $adminKey,
       name = $name,
       restrictions = $restrictions,
@@ -215,59 +208,19 @@ export function updateCallLinkState(
   return callLinkFromRecord(parseUnknown(callLinkRecordSchema, row));
 }
 
-export function updateCallLinkStateAndEpoch(
+export function updateCallLinkAdminKeyByRoomId(
   db: WritableDB,
   roomId: string,
-  callLinkState: CallLinkStateType,
-  epoch: string | null
-): CallLinkType {
-  const { name, restrictions, expiration, revoked } = callLinkState;
-  const restrictionsValue = parseStrict(
-    callLinkRestrictionsSchema,
-    restrictions
-  );
-  const epochBytes = epoch ? toEpochBytes(epoch) : null;
-  const [query, params] = sql`
-    UPDATE callLinks
-    SET
-      name = ${name},
-      epoch = ${epochBytes},
-      restrictions = ${restrictionsValue},
-      expiration = ${expiration},
-      revoked = ${revoked ? 1 : 0}
-    WHERE roomId = ${roomId}
-    RETURNING *;
-  `;
-  const row: unknown = db.prepare(query).get(params);
-  strictAssert(row, 'Expected row to be returned');
-  return callLinkFromRecord(parseUnknown(callLinkRecordSchema, row));
-}
-
-export function updateCallLinkEpochAndAdminKeyByRoomId(
-  db: WritableDB,
-  roomId: string,
-  epoch: string | null,
-  adminKey: string | null
+  adminKey: string
 ): void {
-  const epochBytes = epoch ? toEpochBytes(epoch) : null;
-  if (adminKey) {
-    const adminKeyBytes = toAdminKeyBytes(adminKey);
-    db.prepare(
-      `
-      UPDATE callLinks
-      SET adminKey = $adminKeyBytes, epoch = $epochBytes
-      WHERE roomId = $roomId;
-      `
-    ).run({ roomId, epochBytes, adminKeyBytes });
-  } else {
-    db.prepare(
-      `
-      UPDATE callLinks
-      SET epoch = $epochBytes
-      WHERE roomId = $roomId;
-      `
-    ).run({ roomId, epochBytes });
-  }
+  const adminKeyBytes = toAdminKeyBytes(adminKey);
+  db.prepare(
+    `
+     UPDATE callLinks
+     SET adminKey = $adminKeyBytes
+     WHERE roomId = $roomId;
+     `
+  ).run({ roomId, adminKeyBytes });
 }
 
 function assertRoomIdMatchesRootKey(roomId: string, rootKey: string): void {
@@ -515,7 +468,6 @@ export function insertDefunctCallLink(
     INSERT INTO defunctCallLinks (
       roomId,
       rootKey,
-      epoch,
       adminKey,
       storageID,
       storageVersion,
@@ -524,7 +476,6 @@ export function insertDefunctCallLink(
     ) VALUES (
       $roomId,
       $rootKey,
-      $epoch,
       $adminKey,
       $storageID,
       $storageVersion,
diff --git a/ts/state/ducks/calling.preload.ts b/ts/state/ducks/calling.preload.ts
index aa17f3c588..bc1a24bb85 100644
--- a/ts/state/ducks/calling.preload.ts
+++ b/ts/state/ducks/calling.preload.ts
@@ -7,7 +7,6 @@ import lodash from 'lodash';
 import Long from 'long';
 import type { ReadonlyDeep } from 'type-fest';
 import {
-  CallLinkEpoch,
   CallLinkRootKey,
   CallEndReason,
   type Reaction as CallReaction,
@@ -328,7 +327,6 @@ type HangUpActionPayloadType = ReadonlyDeep<{
 
 export type HandleCallLinkUpdateType = ReadonlyDeep<{
   rootKey: string;
-  epoch: string | null;
   adminKey: string | null;
 }>;
 
@@ -444,7 +442,6 @@ export type StartCallingLobbyType = ReadonlyDeep<{
 
 export type StartCallLinkLobbyType = ReadonlyDeep<{
   rootKey: string;
-  epoch: string | null;
 }>;
 
 export type StartCallLinkLobbyByRoomIdType = ReadonlyDeep<{
@@ -493,7 +490,6 @@ type StartCallLinkLobbyPayloadType = {
   remoteParticipants: Array<GroupCallParticipantInfoType>;
   callLinkState: CallLinkStateType;
   callLinkRoomId: string;
-  callLinkEpoch: string | null;
   callLinkRootKey: string;
 };
 
@@ -618,12 +614,7 @@ const doGroupCallPeek = ({
         // For adhoc calls, conversationId is actually a roomId.
         const callLink = getOwn(state.calling.callLinks, conversationId);
         const rootKey = callLink?.rootKey;
-        const epoch = callLink?.epoch ?? undefined;
-        peekInfo = await calling.peekCallLinkCall(
-          conversationId,
-          rootKey,
-          epoch
-        );
+        peekInfo = await calling.peekCallLinkCall(conversationId, rootKey);
       }
     } catch (err) {
       log.error('Group call peeking failed', Errors.toLogFormat(err));
@@ -1662,7 +1653,7 @@ function handleCallLinkUpdate(
   HandleCallLinkUpdateActionType | CallHistoryAdd
 > {
   return async dispatch => {
-    const { rootKey, epoch, adminKey } = payload;
+    const { rootKey, adminKey } = payload;
     const callLinkRootKey = CallLinkRootKey.parse(rootKey);
     const roomId = getRoomIdFromRootKey(callLinkRootKey);
     const logId = `handleCallLinkUpdate(${roomId})`;
@@ -1672,7 +1663,6 @@ function handleCallLinkUpdate(
       storageNeedsSync: false,
       roomId,
       rootKey,
-      epoch,
       adminKey,
     };
 
@@ -1706,7 +1696,6 @@ function handleCallLinkUpdate(
     drop(
       callLinkRefreshJobQueue.add({
         rootKey,
-        epoch,
         source: 'handleCallLinkUpdate',
       })
     );
@@ -2432,28 +2421,25 @@ function startCallLinkLobbyByRoomId({
       `startCallLinkLobbyByRoomId(${roomId}): call link not found`
     );
 
-    const { rootKey, epoch } = callLink;
-    await _startCallLinkLobby({ rootKey, epoch, dispatch, getState });
+    const { rootKey } = callLink;
+    await _startCallLinkLobby({ rootKey, dispatch, getState });
   };
 }
 
 function startCallLinkLobby({
   rootKey,
-  epoch,
 }: StartCallLinkLobbyType): StartCallLinkLobbyThunkActionType {
   return async (dispatch, getState) => {
-    await _startCallLinkLobby({ rootKey, epoch, dispatch, getState });
+    await _startCallLinkLobby({ rootKey, dispatch, getState });
   };
 }
 
 const _startCallLinkLobby = async ({
   rootKey,
-  epoch,
   dispatch,
   getState,
 }: {
   rootKey: string;
-  epoch: string | null;
   dispatch: ThunkDispatch<
     RootStateType,
     unknown,
@@ -2467,7 +2453,6 @@ const _startCallLinkLobby = async ({
   getState: () => RootStateType;
 }) => {
   const callLinkRootKey = CallLinkRootKey.parse(rootKey);
-  const callLinkEpoch = epoch ? CallLinkEpoch.parse(epoch) : undefined;
   const roomId = getRoomIdFromRootKey(callLinkRootKey);
   const state = getState();
 
@@ -2495,7 +2480,6 @@ const _startCallLinkLobby = async ({
       toggleConfirmLeaveCallModal({
         type: 'adhoc-rootKey',
         rootKey,
-        epoch,
       })
     );
     return;
@@ -2511,7 +2495,7 @@ const _startCallLinkLobby = async ({
     });
 
     let callLinkState: CallLinkStateType | null = null;
-    callLinkState = await calling.readCallLink(callLinkRootKey, callLinkEpoch);
+    callLinkState = await calling.readCallLink(callLinkRootKey);
 
     if (callLinkState == null) {
       const i18n = getIntl(getState());
@@ -2545,27 +2529,13 @@ const _startCallLinkLobby = async ({
 
     const callLink = await DataReader.getCallLinkByRoomId(roomId);
     if (callLink) {
-      await DataWriter.updateCallLinkStateAndEpoch(
-        roomId,
-        callLinkState,
-        epoch
-      );
+      await DataWriter.updateCallLinkState(roomId, callLinkState);
       log.info(`${logId}: Updated existing call link`);
-      if (epoch !== callLink.epoch) {
-        drop(
-          sendCallLinkUpdateSync({
-            rootKey,
-            epoch,
-            adminKey: callLink.adminKey,
-          })
-        );
-      }
     } else {
       const { name, restrictions, expiration, revoked } = callLinkState;
       await DataWriter.insertCallLink({
         roomId,
         rootKey,
-        epoch: epoch ?? null,
         adminKey: null,
         name,
         restrictions,
@@ -2587,7 +2557,6 @@ const _startCallLinkLobby = async ({
 
     const callLobbyData = await calling.startCallLinkLobby({
       callLinkRootKey,
-      callLinkEpoch,
       adminPasskey,
       hasLocalAudio:
         groupCallDeviceCount < MAX_CALL_PARTICIPANTS_FOR_DEFAULT_MUTE,
@@ -2603,7 +2572,6 @@ const _startCallLinkLobby = async ({
         callLinkState,
         callLinkRoomId: roomId,
         callLinkRootKey: rootKey,
-        callLinkEpoch: epoch,
         conversationId: roomId,
         isConversationTooBigToRing: false,
       },
@@ -2650,8 +2618,8 @@ function leaveCurrentCallAndStartCallingLobby(
       const { roomId } = data;
       startCallLinkLobbyByRoomId({ roomId })(dispatch, getState, undefined);
     } else if (type === 'adhoc-rootKey') {
-      const { rootKey, epoch } = data;
-      startCallLinkLobby({ rootKey, epoch })(dispatch, getState, undefined);
+      const { rootKey } = data;
+      startCallLinkLobby({ rootKey })(dispatch, getState, undefined);
     } else {
       throw missingCaseError(type);
     }
@@ -2842,7 +2810,6 @@ function startCall(
         await calling.joinCallLinkCall({
           roomId: conversationId,
           rootKey: callLink.rootKey,
-          epoch: callLink.epoch ?? undefined,
           adminKey: callLink.adminKey ?? undefined,
           hasLocalAudio,
           hasLocalVideo,
@@ -3412,9 +3379,6 @@ export function reducer(
                 rootKey:
                   callLinks[conversationId]?.rootKey ??
                   action.payload.callLinkRootKey,
-                epoch:
-                  callLinks[conversationId]?.epoch ??
-                  action.payload.callLinkEpoch,
                 adminKey: callLinks[conversationId]?.adminKey,
                 storageNeedsSync: false,
               },
diff --git a/ts/state/ducks/globalModals.preload.ts b/ts/state/ducks/globalModals.preload.ts
index 4c7d4351e0..b97cc6a0f4 100644
--- a/ts/state/ducks/globalModals.preload.ts
+++ b/ts/state/ducks/globalModals.preload.ts
@@ -1006,7 +1006,6 @@ function showShareCallLinkViaSignal(
     const url = linkCallRoute
       .toWebUrl({
         key: callLink.rootKey,
-        epoch: callLink.epoch,
       })
       .toString();
     dispatch(
diff --git a/ts/state/smart/CallLinkDetails.preload.tsx b/ts/state/smart/CallLinkDetails.preload.tsx
index e4e8bcb3b2..dd55d312bf 100644
--- a/ts/state/smart/CallLinkDetails.preload.tsx
+++ b/ts/state/smart/CallLinkDetails.preload.tsx
@@ -57,7 +57,7 @@ export const SmartCallLinkDetails = memo(function SmartCallLinkDetails({
 
   const handleStartCallLinkLobby = useCallback(() => {
     strictAssert(callLink != null, 'callLink not found');
-    startCallLinkLobby({ rootKey: callLink.rootKey, epoch: callLink.epoch });
+    startCallLinkLobby({ rootKey: callLink.rootKey });
   }, [callLink, startCallLinkLobby]);
 
   const handleUpdateCallLinkRestrictions = useCallback(
diff --git a/ts/state/smart/CallLinkEditModal.preload.tsx b/ts/state/smart/CallLinkEditModal.preload.tsx
index 6c1e8b0124..e9f35f35f0 100644
--- a/ts/state/smart/CallLinkEditModal.preload.tsx
+++ b/ts/state/smart/CallLinkEditModal.preload.tsx
@@ -49,7 +49,6 @@ export const SmartCallLinkEditModal = memo(
       const callLinkWebUrl = linkCallRoute
         .toWebUrl({
           key: callLink?.rootKey,
-          epoch: callLink?.epoch,
         })
         .toString();
       drop(copyCallLink(callLinkWebUrl));
@@ -73,7 +72,7 @@ export const SmartCallLinkEditModal = memo(
 
     const handleStartCallLinkLobby = useCallback(() => {
       strictAssert(callLink != null, 'callLink not found');
-      startCallLinkLobby({ rootKey: callLink.rootKey, epoch: callLink.epoch });
+      startCallLinkLobby({ rootKey: callLink.rootKey });
       toggleCallLinkEditModal(null);
     }, [callLink, startCallLinkLobby, toggleCallLinkEditModal]);
 
diff --git a/ts/test-electron/backup/calling_test.preload.ts b/ts/test-electron/backup/calling_test.preload.ts
index 0cd0f1aaae..fe0a90e9fb 100644
--- a/ts/test-electron/backup/calling_test.preload.ts
+++ b/ts/test-electron/backup/calling_test.preload.ts
@@ -181,7 +181,6 @@ describe('backup/calling', () => {
       const adminKey = CallLinkRootKey.generateAdminPassKey();
       adminCallLink = {
         rootKey: adminRootKey.toString(),
-        epoch: null,
         roomId: getRoomIdFromRootKey(adminRootKey),
         adminKey: fromAdminKeyBytes(adminKey),
         name: "Let's Talk Rocks",
@@ -197,7 +196,6 @@ describe('backup/calling', () => {
       const rootKey = CallLinkRootKey.generate();
       callLink = {
         rootKey: rootKey.toString(),
-        epoch: null,
         roomId: getRoomIdFromRootKey(rootKey),
         adminKey: null,
         name: "Let's Talk Rocks #2",
diff --git a/ts/test-electron/state/ducks/calling_test.preload.ts b/ts/test-electron/state/ducks/calling_test.preload.ts
index d817929299..327979a4f1 100644
--- a/ts/test-electron/state/ducks/calling_test.preload.ts
+++ b/ts/test-electron/state/ducks/calling_test.preload.ts
@@ -1467,7 +1467,7 @@ describe('calling duck', () => {
     });
 
     describe('handleCallLinkUpdate', () => {
-      const { roomId, rootKey, epoch, adminKey } = FAKE_CALL_LINK;
+      const { roomId, rootKey, adminKey } = FAKE_CALL_LINK;
 
       beforeEach(async function (this: Mocha.Context) {
         await DataWriter.removeAll();
@@ -1488,7 +1488,7 @@ describe('calling duck', () => {
       };
 
       it('queues call link refresh', async function (this: Mocha.Context) {
-        await doAction({ rootKey, epoch, adminKey: null });
+        await doAction({ rootKey, adminKey: null });
 
         sinon.assert.calledOnce(this.callLinkRefreshJobQueueAdd);
       });
@@ -1496,7 +1496,6 @@ describe('calling duck', () => {
       it('dispatches HANDLE_CALL_LINK_UPDATE', async () => {
         const { dispatch } = await doAction({
           rootKey,
-          epoch,
           adminKey: null,
         });
 
@@ -1507,7 +1506,6 @@ describe('calling duck', () => {
             callLink: {
               ...CALL_LINK_DEFAULT_STATE,
               roomId,
-              epoch,
               rootKey,
               adminKey,
               storageNeedsSync: false,
@@ -1519,7 +1517,6 @@ describe('calling duck', () => {
       it('can save adminKey', async () => {
         const { dispatch } = await doAction({
           rootKey,
-          epoch: null,
           adminKey: 'banana',
         });
 
@@ -1531,7 +1528,6 @@ describe('calling duck', () => {
               callLink: {
                 ...CALL_LINK_DEFAULT_STATE,
                 roomId,
-                epoch,
                 rootKey,
                 adminKey: 'banana',
                 storageNeedsSync: false,
@@ -1596,8 +1592,8 @@ describe('calling duck', () => {
       };
 
       it('reads the link and dispatches START_CALL_LINK_LOBBY', async function (this: Mocha.Context) {
-        const { roomId, epoch, rootKey } = FAKE_CALL_LINK;
-        const { dispatch } = await doAction({ rootKey, epoch });
+        const { roomId, rootKey } = FAKE_CALL_LINK;
+        const { dispatch } = await doAction({ rootKey });
 
         sinon.assert.calledTwice(dispatch);
         sinon.assert.calledWith(dispatch, {
@@ -1613,7 +1609,6 @@ describe('calling duck', () => {
             callLinkState,
             callLinkRoomId: roomId,
             callLinkRootKey: rootKey,
-            callLinkEpoch: epoch,
             conversationId: roomId,
             isConversationTooBigToRing: false,
           },
@@ -1622,14 +1617,12 @@ describe('calling duck', () => {
 
       it('preserves adminKey', () => {
         const { startCallLinkLobby } = actions;
-        const { roomId, rootKey, epoch, adminKey } =
-          FAKE_CALL_LINK_WITH_ADMIN_KEY;
+        const { roomId, rootKey, adminKey } = FAKE_CALL_LINK_WITH_ADMIN_KEY;
         const dispatch = sinon.spy();
         const result = reducer(
           getStateWithAdminKey().calling,
           startCallLinkLobby({
             rootKey,
-            epoch,
           })(
             dispatch,
             getStateWithAdminKey,
@@ -1658,7 +1651,7 @@ describe('calling duck', () => {
 
       it('fails', async function (this: Mocha.Context) {
         const { roomId, rootKey } = FAKE_CALL_LINK;
-        const { dispatch } = await doAction({ rootKey, epoch: null });
+        const { dispatch } = await doAction({ rootKey });
 
         sinon.assert.calledTwice(dispatch);
         sinon.assert.calledWith(dispatch, {
diff --git a/ts/test-helpers/fakeCallLink.std.ts b/ts/test-helpers/fakeCallLink.std.ts
index b932dc57f6..13052e7847 100644
--- a/ts/test-helpers/fakeCallLink.std.ts
+++ b/ts/test-helpers/fakeCallLink.std.ts
@@ -13,22 +13,6 @@ export const FAKE_CALL_LINK: CallLinkType = {
   revoked: false,
   roomId: 'd517b48dd118bee24068d4938886c8abe192706d84936d52594a9157189d2759',
   rootKey: 'dxbb-xfqz-xkgp-nmrx-bpqn-ptkb-spdt-pdgt',
-  epoch: null,
-  storageID: undefined,
-  storageVersion: undefined,
-  storageUnknownFields: undefined,
-  storageNeedsSync: false,
-};
-
-export const FAKE_CALL_LINK_WITH_EPOCH: CallLinkType = {
-  adminKey: null,
-  expiration: Date.now() + MONTH, // set me
-  name: 'Fun Link',
-  restrictions: CallLinkRestrictions.None,
-  revoked: false,
-  roomId: 'd517b48dd118bee24068d4938886c8abe192706d84936d52594a9157189d2759',
-  rootKey: 'dxbb-xfqz-xkgp-nmrx-bpqn-ptkb-spdt-pdgt',
-  epoch: 'bpmc-mrgn',
   storageID: undefined,
   storageVersion: undefined,
   storageUnknownFields: undefined,
@@ -44,23 +28,6 @@ export const FAKE_CALL_LINK_WITH_ADMIN_KEY: CallLinkType = {
   revoked: false,
   roomId: 'c097eb04cc278d6bc7ed9fb2ddeac00dc9646ae6ddb38513dad9a8a4fe3c38f4',
   rootKey: 'bpmc-mrgn-hntf-mffd-mndd-xbxk-zmgq-qszg',
-  epoch: null,
-  storageID: undefined,
-  storageVersion: undefined,
-  storageUnknownFields: undefined,
-  storageNeedsSync: false,
-};
-
-// Please set expiration
-export const FAKE_CALL_LINK_WITH_ADMIN_KEY_AND_EPOCH: CallLinkType = {
-  adminKey: 'xXPI77e6MoVHYREW8iKYmQ==',
-  expiration: Date.now() + MONTH, // set me
-  name: 'Admin Link',
-  restrictions: CallLinkRestrictions.None,
-  revoked: false,
-  roomId: 'c097eb04cc278d6bc7ed9fb2ddeac00dc9646ae6ddb38513dad9a8a4fe3c38f4',
-  rootKey: 'bpmc-mrgn-hntf-mffd-mndd-xbxk-zmgq-qszg',
-  epoch: 'dxbb-xfqz',
   storageID: undefined,
   storageVersion: undefined,
   storageUnknownFields: undefined,
diff --git a/ts/test-node/util/callLinks_test.node.ts b/ts/test-node/util/callLinks_test.node.ts
index 71dad462bb..f064e91e14 100644
--- a/ts/test-node/util/callLinks_test.node.ts
+++ b/ts/test-node/util/callLinks_test.node.ts
@@ -10,18 +10,11 @@ import {
 import {
   FAKE_CALL_LINK as CALL_LINK,
   FAKE_CALL_LINK_WITH_ADMIN_KEY as CALL_LINK_WITH_ADMIN_KEY,
-  FAKE_CALL_LINK_WITH_EPOCH as CALL_LINK_WITH_EPOCH,
-  FAKE_CALL_LINK_WITH_ADMIN_KEY_AND_EPOCH as CALL_LINK_WITH_ADMIN_KEY_AND_EPOCH,
 } from '../../test-helpers/fakeCallLink.std.js';
 
 describe('callLinks', () => {
   it('callLinkToRecord() and callLinkFromRecord() can convert to record and back', () => {
-    [
-      CALL_LINK,
-      CALL_LINK_WITH_ADMIN_KEY,
-      CALL_LINK_WITH_EPOCH,
-      CALL_LINK_WITH_ADMIN_KEY_AND_EPOCH,
-    ].forEach(callLink => {
+    [CALL_LINK, CALL_LINK_WITH_ADMIN_KEY].forEach(callLink => {
       const record = callLinkToRecord(callLink);
       const returnedCallLink = callLinkFromRecord(record);
       assert.deepEqual(returnedCallLink, callLink);
diff --git a/ts/test-node/util/signalRoutes_test.std.ts b/ts/test-node/util/signalRoutes_test.std.ts
index 68d09e8c85..a80c0059c5 100644
--- a/ts/test-node/util/signalRoutes_test.std.ts
+++ b/ts/test-node/util/signalRoutes_test.std.ts
@@ -38,7 +38,6 @@ describe('signalRoutes', () => {
 
   const foo = 'FoO.bAr-BaZ_123/456';
   const fooNoSlash = 'FoO.bAr-BaZ_123';
-  const bar = '.bAr';
 
   it('nonsense', () => {
     const check = createCheck({
@@ -158,7 +157,7 @@ describe('signalRoutes', () => {
   it('linkCall', () => {
     const result: ParsedSignalRoute = {
       key: 'linkCall',
-      args: { key: foo, epoch: null },
+      args: { key: foo },
     };
     const check = createCheck();
     check(`https://signal.link/call/#key=${foo}`, result);
@@ -167,18 +166,6 @@ describe('signalRoutes', () => {
     check(`sgnl://signal.link/call#key=${foo}`, result);
   });
 
-  it('linkCallWithEpoch', () => {
-    const result: ParsedSignalRoute = {
-      key: 'linkCall',
-      args: { key: foo, epoch: bar },
-    };
-    const check = createCheck();
-    check(`https://signal.link/call/#key=${foo}&epoch=${bar}`, result);
-    check(`https://signal.link/call#key=${foo}&epoch=${bar}`, result);
-    check(`sgnl://signal.link/call/#key=${foo}&epoch=${bar}`, result);
-    check(`sgnl://signal.link/call#key=${foo}&epoch=${bar}`, result);
-  });
-
   it('artAddStickers', () => {
     const result: ParsedSignalRoute = {
       key: 'artAddStickers',
diff --git a/ts/textsecure/MessageReceiver.preload.ts b/ts/textsecure/MessageReceiver.preload.ts
index 959ce0952a..bdb380b67b 100644
--- a/ts/textsecure/MessageReceiver.preload.ts
+++ b/ts/textsecure/MessageReceiver.preload.ts
@@ -3489,9 +3489,6 @@ export default class MessageReceiver
     const rootKey = Bytes.isNotEmpty(callLinkUpdate.rootKey)
       ? callLinkUpdate.rootKey
       : undefined;
-    const epoch = Bytes.isNotEmpty(callLinkUpdate.epoch)
-      ? callLinkUpdate.epoch
-      : undefined;
     const adminKey = Bytes.isNotEmpty(callLinkUpdate.adminPasskey)
       ? callLinkUpdate.adminPasskey
       : undefined;
@@ -3500,7 +3497,6 @@ export default class MessageReceiver
       {
         type: callLinkUpdateSyncType,
         rootKey,
-        epoch,
         adminKey,
       },
       this.#removeFromCache.bind(this, envelope)
diff --git a/ts/textsecure/messageReceiverEvents.std.ts b/ts/textsecure/messageReceiverEvents.std.ts
index b3f6848969..e7b8c70aea 100644
--- a/ts/textsecure/messageReceiverEvents.std.ts
+++ b/ts/textsecure/messageReceiverEvents.std.ts
@@ -478,7 +478,6 @@ export class CallEventSyncEvent extends ConfirmableEvent {
 export type CallLinkUpdateSyncEventData = Readonly<{
   type: CallLinkUpdateSyncType;
   rootKey: Uint8Array | undefined;
-  epoch: Uint8Array | undefined;
   adminKey: Uint8Array | undefined;
 }>;
 
diff --git a/ts/types/CallLink.std.ts b/ts/types/CallLink.std.ts
index 5f6280275e..8f820806a9 100644
--- a/ts/types/CallLink.std.ts
+++ b/ts/types/CallLink.std.ts
@@ -57,7 +57,6 @@ export function toCallLinkRestrictions(
 
 export type CallLinkType = Readonly<{
   roomId: string;
-  epoch: string | null;
   rootKey: string;
   adminKey: string | null;
   name: string;
@@ -87,7 +86,6 @@ export type CallLinkConversationType = ReadonlyDeep<
 // Call link discovered from sync, waiting to refresh state from the calling server
 export type PendingCallLinkType = Readonly<{
   rootKey: string;
-  epoch: string | null;
   adminKey: string | null;
 }> &
   StorageServiceFieldsType;
@@ -96,7 +94,6 @@ export type PendingCallLinkType = Readonly<{
 export type DefunctCallLinkType = Readonly<{
   roomId: string;
   rootKey: string;
-  epoch: string | null;
   adminKey: string | null;
 }> &
   StorageServiceFieldsType;
@@ -104,7 +101,6 @@ export type DefunctCallLinkType = Readonly<{
 export type DefunctCallLinkRecord = Readonly<{
   roomId: string;
   rootKey: Uint8Array;
-  epoch: Uint8Array | null;
   adminKey: Uint8Array | null;
   storageID: string | null;
   storageVersion: number | null;
@@ -115,7 +111,6 @@ export type DefunctCallLinkRecord = Readonly<{
 export const defunctCallLinkRecordSchema = z.object({
   roomId: z.string(),
   rootKey: z.instanceof(Uint8Array),
-  epoch: z.instanceof(Uint8Array).nullable(),
   adminKey: z.instanceof(Uint8Array).nullable(),
   storageID: z.string().nullable(),
   storageVersion: z.number().int().nullable(),
@@ -127,7 +122,6 @@ export const defunctCallLinkRecordSchema = z.object({
 export type CallLinkRecord = Readonly<{
   roomId: string;
   rootKey: Uint8Array | null;
-  epoch: Uint8Array | null;
   adminKey: Uint8Array | null;
   name: string;
   restrictions: number;
@@ -145,7 +139,6 @@ export const callLinkRecordSchema = z.object({
   roomId: z.string(),
   // credentials
   rootKey: z.instanceof(Uint8Array).nullable(),
-  epoch: z.instanceof(Uint8Array).nullable(),
   adminKey: z.instanceof(Uint8Array).nullable(),
   // state
   name: callLinkNameSchema,
diff --git a/ts/util/callLinks.std.ts b/ts/util/callLinks.std.ts
index 2762069f8a..a1ac149cbf 100644
--- a/ts/util/callLinks.std.ts
+++ b/ts/util/callLinks.std.ts
@@ -40,24 +40,6 @@ export function getKeyFromCallLink(callLink: string): string {
   return hashParams.get('key') || '';
 }
 
-export function getKeyAndEpochFromCallLink(callLink: string): {
-  key: string;
-  epoch: string;
-} {
-  const url = new URL(callLink);
-  if (url == null) {
-    throw new Error('Failed to parse call link URL');
-  }
-
-  const hash = url.hash.slice(1);
-  const hashParams = new URLSearchParams(hash);
-
-  return {
-    key: hashParams.get('key') || '',
-    epoch: hashParams.get('epoch') || '',
-  };
-}
-
 export function callLinkToConversation(
   callLink: CallLinkType,
   i18n: LocalizerType
diff --git a/ts/util/callLinksRingrtc.node.ts b/ts/util/callLinksRingrtc.node.ts
index a7df3538c8..c5e1c5cb74 100644
--- a/ts/util/callLinksRingrtc.node.ts
+++ b/ts/util/callLinksRingrtc.node.ts
@@ -4,7 +4,6 @@
 import {
   CallLinkRestrictions as RingRTCCallLinkRestrictions,
   CallLinkRootKey,
-  CallLinkEpoch,
 } from '@signalapp/ringrtc';
 import type { CallLinkState as RingRTCCallLinkState } from '@signalapp/ringrtc';
 import { z } from 'zod';
@@ -84,14 +83,6 @@ export function fromRootKeyBytes(rootKey: Uint8Array): string {
   return CallLinkRootKey.fromBytes(rootKey as Buffer).toString();
 }
 
-export function toEpochBytes(epoch: string): Uint8Array {
-  return CallLinkEpoch.parse(epoch).bytes;
-}
-
-export function fromEpochBytes(epoch: Uint8Array): string {
-  return CallLinkEpoch.fromBytes(epoch).toString();
-}
-
 /**
  * DB record conversions
  */
@@ -103,12 +94,10 @@ export function callLinkFromRecord(record: CallLinkRecord): CallLinkType {
 
   // root keys in memory are strings for simplicity
   const rootKey = fromRootKeyBytes(record.rootKey);
-  const epoch = record.epoch ? fromEpochBytes(record.epoch) : null;
   const adminKey = record.adminKey ? fromAdminKeyBytes(record.adminKey) : null;
   return {
     roomId: record.roomId,
     rootKey,
-    epoch,
     adminKey,
     name: record.name,
     restrictions: toCallLinkRestrictions(record.restrictions),
@@ -127,14 +116,12 @@ export function callLinkToRecord(callLink: CallLinkType): CallLinkRecord {
   }
 
   const rootKey = toRootKeyBytes(callLink.rootKey);
-  const epoch = callLink.epoch ? toEpochBytes(callLink.epoch) : null;
   const adminKey = callLink.adminKey
     ? toAdminKeyBytes(callLink.adminKey)
     : null;
   return parseStrict(callLinkRecordSchema, {
     roomId: callLink.roomId,
     rootKey,
-    epoch,
     adminKey,
     name: callLink.name,
     restrictions: callLink.restrictions,
@@ -156,12 +143,10 @@ export function defunctCallLinkFromRecord(
 
   const rootKey = fromRootKeyBytes(record.rootKey);
   const adminKey = record.adminKey ? fromAdminKeyBytes(record.adminKey) : null;
-  const epoch = record.epoch ? fromEpochBytes(record.epoch) : null;
   return {
     roomId: record.roomId,
     rootKey,
     adminKey,
-    epoch,
     storageID: record.storageID || undefined,
     storageVersion: record.storageVersion || undefined,
     storageUnknownFields: record.storageUnknownFields || undefined,
@@ -177,16 +162,12 @@ export function defunctCallLinkToRecord(
   }
 
   const rootKey = toRootKeyBytes(defunctCallLink.rootKey);
-  const epoch = defunctCallLink.epoch
-    ? toEpochBytes(defunctCallLink.epoch)
-    : null;
   const adminKey = defunctCallLink.adminKey
     ? toAdminKeyBytes(defunctCallLink.adminKey)
     : null;
   return parseStrict(defunctCallLinkRecordSchema, {
     roomId: defunctCallLink.roomId,
     rootKey,
-    epoch,
     adminKey,
     storageID: defunctCallLink.storageID || null,
     storageVersion: defunctCallLink.storageVersion || null,
diff --git a/ts/util/onCallLinkUpdateSync.preload.ts b/ts/util/onCallLinkUpdateSync.preload.ts
index 523bc9e47a..f42b5969f6 100644
--- a/ts/util/onCallLinkUpdateSync.preload.ts
+++ b/ts/util/onCallLinkUpdateSync.preload.ts
@@ -6,10 +6,7 @@ import type { CallLinkUpdateSyncEvent } from '../textsecure/messageReceiverEvent
 import { createLogger } from '../logging/log.std.js';
 import * as Errors from '../types/errors.std.js';
 import { fromAdminKeyBytes } from './callLinks.std.js';
-import {
-  fromEpochBytes,
-  getRoomIdFromRootKey,
-} from './callLinksRingrtc.node.js';
+import { getRoomIdFromRootKey } from './callLinksRingrtc.node.js';
 import { strictAssert } from './assert.std.js';
 import { CallLinkUpdateSyncType } from '../types/CallLink.std.js';
 import { DataWriter } from '../sql/Client.preload.js';
@@ -20,7 +17,7 @@ export async function onCallLinkUpdateSync(
   syncEvent: CallLinkUpdateSyncEvent
 ): Promise<void> {
   const { callLinkUpdate, confirm } = syncEvent;
-  const { type, rootKey, epoch, adminKey } = callLinkUpdate;
+  const { type, rootKey, adminKey } = callLinkUpdate;
 
   if (!rootKey) {
     log.warn('Missing rootKey, invalid sync message');
@@ -47,11 +44,9 @@ export async function onCallLinkUpdateSync(
   try {
     if (type === CallLinkUpdateSyncType.Update) {
       const rootKeyString = callLinkRootKey.toString();
-      const epochString = epoch ? fromEpochBytes(epoch) : null;
       const adminKeyString = adminKey ? fromAdminKeyBytes(adminKey) : null;
       window.reduxActions.calling.handleCallLinkUpdate({
         rootKey: rootKeyString,
-        epoch: epochString,
         adminKey: adminKeyString,
       });
     } else if (type === CallLinkUpdateSyncType.Delete) {
diff --git a/ts/util/sendCallLinkUpdateSync.preload.ts b/ts/util/sendCallLinkUpdateSync.preload.ts
index 113effb726..c50c15541f 100644
--- a/ts/util/sendCallLinkUpdateSync.preload.ts
+++ b/ts/util/sendCallLinkUpdateSync.preload.ts
@@ -11,14 +11,13 @@ import { SignalService as Proto } from '../protobuf/index.std.js';
 import { singleProtoJobQueue } from '../jobs/singleProtoJobQueue.preload.js';
 import { MessageSender } from '../textsecure/SendMessage.preload.js';
 import { toAdminKeyBytes } from './callLinks.std.js';
-import { toEpochBytes, toRootKeyBytes } from './callLinksRingrtc.node.js';
+import { toRootKeyBytes } from './callLinksRingrtc.node.js';
 import { itemStorage } from '../textsecure/Storage.preload.js';
 
 const log = createLogger('sendCallLinkUpdateSync');
 
 export type sendCallLinkUpdateSyncCallLinkType = {
   rootKey: string;
-  epoch: string | null;
   adminKey: string | null;
 };
 
@@ -47,7 +46,6 @@ async function _sendCallLinkUpdateSync(
     const callLinkUpdate = new Proto.SyncMessage.CallLinkUpdate({
       type: protoType,
       rootKey: toRootKeyBytes(callLink.rootKey),
-      epoch: callLink.epoch ? toEpochBytes(callLink.epoch) : null,
       adminPasskey: callLink.adminKey
         ? toAdminKeyBytes(callLink.adminKey)
         : null,
diff --git a/ts/util/signalRoutes.std.ts b/ts/util/signalRoutes.std.ts
index 371caa3aa8..be7ae2a850 100644
--- a/ts/util/signalRoutes.std.ts
+++ b/ts/util/signalRoutes.std.ts
@@ -217,7 +217,6 @@ function _route<Key extends string, Args extends object>(
 }
 
 const paramSchema = z.string().min(1);
-const paramEpoch = z.nullable(z.string().min(1));
 
 /**
  * signal.me by phone number
@@ -401,25 +400,19 @@ export const linkCallRoute = _route('linkCall', {
   ],
   schema: z.object({
     key: paramSchema, // ConsonantBase16
-    epoch: paramEpoch, // ConsonantBase16
   }),
   parse(result) {
     const params = new URLSearchParams(result.hash.groups.params);
     return {
       key: params.get('key'),
-      epoch: params.get('epoch'),
     };
   },
   toWebUrl(args) {
-    const params = new URLSearchParams(
-      args.epoch ? { key: args.key, epoch: args.epoch } : { key: args.key }
-    );
+    const params = new URLSearchParams({ key: args.key });
     return new URL(`https://signal.link/call/#${params.toString()}`);
   },
   toAppUrl(args) {
-    const params = new URLSearchParams(
-      args.epoch ? { key: args.key, epoch: args.epoch } : { key: args.key }
-    );
+    const params = new URLSearchParams({ key: args.key });
     return new URL(`sgnl://signal.link/call/#${params.toString()}`);
   },
 });
diff --git a/ts/windows/main/phase1-ipc.preload.ts b/ts/windows/main/phase1-ipc.preload.ts
index 6fdd4fa4ae..849e41d556 100644
--- a/ts/windows/main/phase1-ipc.preload.ts
+++ b/ts/windows/main/phase1-ipc.preload.ts
@@ -384,11 +384,8 @@ ipc.on('start-call-lobby', (_event, info) => {
   window.Events.startCallingLobbyViaToken(info.token);
 });
 
-ipc.on('start-call-link', (_event, { key, epoch }) => {
-  window.reduxActions?.calling?.startCallLinkLobby({
-    rootKey: key,
-    epoch,
-  });
+ipc.on('start-call-link', (_event, { key }) => {
+  window.reduxActions?.calling?.startCallLinkLobby({ rootKey: key });
 });
 
 ipc.on('show-window', () => {