diff --git a/homeassistant/components/mqtt/__init__.py b/homeassistant/components/mqtt/__init__.py
index 47bdd3eee11b..ec7fe933bf2a 100644
--- a/homeassistant/components/mqtt/__init__.py
+++ b/homeassistant/components/mqtt/__init__.py
@@ -87,7 +87,6 @@ from .const import (
     DEFAULT_RETAIN,
     DOMAIN,
     ENTITY_PLATFORMS,
-    ENTRY_OPTION_FIELDS,
     MQTT_CONNECTION_STATE,
     PROTOCOL_5,
     PROTOCOL_311,
@@ -154,7 +153,6 @@ __all__ = [
     "DEFAULT_RETAIN",
     "DOMAIN",
     "ENTITY_PLATFORMS",
-    "ENTRY_OPTION_FIELDS",
     "MQTT",
     "MQTT_BASE_SCHEMA",
     "MQTT_CONNECTION_STATE",
@@ -468,27 +466,30 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 
 async def async_migrate_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
-    """Migrate the options from config entry data."""
+    """Migrate the config entry to the latest version."""
     _LOGGER.debug("Migrating from version %s.%s", entry.version, entry.minor_version)
     data: dict[str, Any] = dict(entry.data)
     options: dict[str, Any] = dict(entry.options)
 
     if entry.version == 1 and entry.minor_version < 2:
-        # Can be removed when the config entry is bumped to version 2.1
-        # with HA Core 2026.7.0. Read support for version 2.1 is expected with 2026.1
-        # From 2026.7 we will write version 2.1
-        for key in ENTRY_OPTION_FIELDS:
+        for key in (
+            CONF_DISCOVERY,
+            CONF_DISCOVERY_PREFIX,
+            "birth_message",
+            "will_message",
+        ):
             if key not in data:
                 continue
             options[key] = data.pop(key)
-        # Write version 1.2 for backwards compatibility
-        hass.config_entries.async_update_entry(
-            entry,
-            data=data,
-            options=options,
-            version=1,
-            minor_version=2,
-        )
+
+    # Bump config entry to version 2.1
+    hass.config_entries.async_update_entry(
+        entry,
+        data=data,
+        options=options,
+        version=2,
+        minor_version=1,
+    )
 
     _LOGGER.debug(
         "Migration to version %s.%s successful", entry.version, entry.minor_version
diff --git a/homeassistant/components/mqtt/const.py b/homeassistant/components/mqtt/const.py
index 268441ca85c8..a045a0e96042 100644
--- a/homeassistant/components/mqtt/const.py
+++ b/homeassistant/components/mqtt/const.py
@@ -5,7 +5,7 @@ import logging
 import jinja2
 
 from homeassistant.components.alarm_control_panel import AlarmControlPanelEntityFeature
-from homeassistant.const import CONF_DISCOVERY, CONF_PAYLOAD, Platform
+from homeassistant.const import CONF_PAYLOAD, Platform
 from homeassistant.exceptions import TemplateError
 
 ATTR_DISCOVERY_HASH = "discovery_hash"
@@ -385,17 +385,6 @@ PAYLOAD_NONE = "None"
 CONFIG_ENTRY_VERSION = 2
 CONFIG_ENTRY_MINOR_VERSION = 1
 
-# Split mqtt entry data and options
-# Can be removed when config entry is bumped to version 2.1
-# with HA Core 2026.7.0. Read support for version 2.1 is expected from 2026.1
-# From 2026.7 we will write version 2.1
-ENTRY_OPTION_FIELDS = (
-    CONF_DISCOVERY,
-    CONF_DISCOVERY_PREFIX,
-    "birth_message",
-    "will_message",
-)
-
 ENTITY_PLATFORMS = [
     Platform.ALARM_CONTROL_PANEL,
     Platform.BINARY_SENSOR,
diff --git a/tests/components/mqtt/test_config_flow.py b/tests/components/mqtt/test_config_flow.py
index dce672033c0c..d0be9e4e82d2 100644
--- a/tests/components/mqtt/test_config_flow.py
+++ b/tests/components/mqtt/test_config_flow.py
@@ -2586,8 +2586,8 @@ async def test_reconfigure_no_changed_password(
         "expected_minor_version",
     ),
     [
-        (1, 1, MOCK_ENTRY_DATA | MOCK_ENTRY_OPTIONS, {}, 1, 2),
-        (1, 2, MOCK_ENTRY_DATA, MOCK_ENTRY_OPTIONS, 1, 2),
+        (1, 1, MOCK_ENTRY_DATA | MOCK_ENTRY_OPTIONS, {}, 2, 1),
+        (1, 2, MOCK_ENTRY_DATA, MOCK_ENTRY_OPTIONS, 2, 1),
         (2, 1, MOCK_ENTRY_DATA, MOCK_ENTRY_OPTIONS, 2, 1),
     ],
 )
@@ -2623,45 +2623,6 @@ async def test_migrate_config_entry(
     assert config_entry.minor_version == expected_minor_version
 
 
-@pytest.mark.parametrize(
-    (
-        "version",
-        "minor_version",
-        "data",
-        "options",
-    ),
-    [
-        (3, 1, MOCK_ENTRY_DATA, MOCK_ENTRY_OPTIONS),
-    ],
-)
-@pytest.mark.usefixtures("mock_reload_after_entry_update")
-async def test_migrate_of_incompatible_config_entry(
-    hass: HomeAssistant,
-    mqtt_mock_entry: MqttMockHAClientGenerator,
-    version: int,
-    minor_version: int,
-    data: dict[str, Any],
-    options: dict[str, Any],
-) -> None:
-    """Test migrating a config entry."""
-    config_entry = hass.config_entries.async_entries(DOMAIN)[0]
-    # Mock an incompatible config entry version
-    hass.config_entries.async_update_entry(
-        config_entry,
-        data=data,
-        options=options,
-        version=version,
-        minor_version=minor_version,
-    )
-    await hass.async_block_till_done()
-
-    # Try to start MQTT with incompatible config entry
-    with pytest.raises(AssertionError):
-        await mqtt_mock_entry()
-
-    assert config_entry.state is config_entries.ConfigEntryState.MIGRATION_ERROR
-
-
 @pytest.mark.parametrize(
     (
         "config_subentries_data",