diff --git a/native/redux/persist-constants.js b/native/redux/persist-constants.js
--- a/native/redux/persist-constants.js
+++ b/native/redux/persist-constants.js
@@ -1,6 +1,6 @@
 // @flow
 
 const rootKey = 'root';
-const storeVersion = 88;
+const storeVersion = 89;
 
 export { rootKey, storeVersion };
diff --git a/native/redux/persist.js b/native/redux/persist.js
--- a/native/redux/persist.js
+++ b/native/redux/persist.js
@@ -74,6 +74,7 @@
 import { messageStoreMessagesBlocklistTransform } from 'lib/shared/transforms/message-store-transform.js';
 import {
   DEPRECATED_unshimMessageStore,
+  unshimDMOperations,
   unshimFunc,
 } from 'lib/shared/unshim-utils.js';
 import {
@@ -81,6 +82,7 @@
   defaultAlertInfos,
   alertTypes,
 } from 'lib/types/alert-types.js';
+import { dmOperationTypes } from 'lib/types/dm-ops.js';
 import { defaultEnabledApps } from 'lib/types/enabled-apps.js';
 import { defaultCalendarQuery } from 'lib/types/entry-types.js';
 import type { EntryStore } from 'lib/types/entry-types.js';
@@ -1575,6 +1577,12 @@
       },
     };
   }: MigrationFunction<NavInfo, AppState>),
+  [89]: (async (state: AppState) =>
+    unshimDMOperations(
+      state,
+      dmOperationTypes.SEND_DELETE_MESSAGE,
+      handleReduxMigrationFailure,
+    ): MigrationFunction<NavInfo, AppState>),
 });
 
 // NOTE: renaming this object, and especially the `version` property
diff --git a/web/redux/persist-constants.js b/web/redux/persist-constants.js
--- a/web/redux/persist-constants.js
+++ b/web/redux/persist-constants.js
@@ -3,6 +3,6 @@
 const rootKey = 'root';
 const rootKeyPrefix = 'persist:';
 const completeRootKey = `${rootKeyPrefix}${rootKey}`;
-const storeVersion = 88;
+const storeVersion = 89;
 
 export { rootKey, rootKeyPrefix, completeRootKey, storeVersion };
diff --git a/web/redux/persist.js b/web/redux/persist.js
--- a/web/redux/persist.js
+++ b/web/redux/persist.js
@@ -27,7 +27,9 @@
 import { deprecatedUpdateRolesAndPermissions } from 'lib/shared/redux/deprecated-update-roles-and-permissions.js';
 import { keyserverStoreTransform } from 'lib/shared/transforms/keyserver-store-transform.js';
 import { messageStoreMessagesBlocklistTransform } from 'lib/shared/transforms/message-store-transform.js';
+import { unshimDMOperations } from 'lib/shared/unshim-utils.js';
 import { defaultAlertInfos } from 'lib/types/alert-types.js';
+import { dmOperationTypes } from 'lib/types/dm-ops.js';
 import { defaultCalendarQuery } from 'lib/types/entry-types.js';
 import type { KeyserverInfo } from 'lib/types/keyserver-types.js';
 import { messageTypes } from 'lib/types/message-types-enum.js';
@@ -811,6 +813,12 @@
       },
     };
   }: MigrationFunction<WebNavInfo, AppState>),
+  [89]: (async (state: AppState) =>
+    unshimDMOperations(
+      state,
+      dmOperationTypes.SEND_DELETE_MESSAGE,
+      handleReduxMigrationFailure,
+    ): MigrationFunction<WebNavInfo, AppState>),
 };
 
 const persistConfig: PersistConfig = {