Fix #86853

src/vs/workbench/api/common/configurationExtensionPoint.ts

@@ -317,6 +317,5 @@ jsonRegistry.registerSchema('vscode://schemas/workspaceConfig', {
 			description: nls.localize('workspaceConfig.remoteAuthority', "The remote server where the workspace is located. Only used by unsaved remote workspaces."),
 		}
 	},
-	additionalProperties: false,
 	errorMessage: nls.localize('unknownWorkspaceProperty', "Unknown workspace configuration property")
 });