diff --git a/lib/permissions/special-roles.js b/lib/permissions/special-roles.js
--- a/lib/permissions/special-roles.js
+++ b/lib/permissions/special-roles.js
@@ -65,4 +65,8 @@
   return _mapValues(patchRawThreadInfoWithSpecialRole)(rawThreadInfos);
 }
 
-export { patchRoleInfoWithSpecialRole, patchRawThreadInfosWithSpecialRole };
+export {
+  patchRoleInfoWithSpecialRole,
+  patchRawThreadInfoWithSpecialRole,
+  patchRawThreadInfosWithSpecialRole,
+};
diff --git a/web/redux/persist.js b/web/redux/persist.js
--- a/web/redux/persist.js
+++ b/web/redux/persist.js
@@ -10,6 +10,8 @@
   keyserverStoreOpsHandlers,
   type ReplaceKeyserverOperation,
 } from 'lib/ops/keyserver-store-ops.js';
+import type { ClientDBThreadStoreOperation } from 'lib/ops/thread-store-ops.js';
+import { patchRawThreadInfoWithSpecialRole } from 'lib/permissions/special-roles.js';
 import {
   createAsyncMigrate,
   type StorageMigrationFunction,
@@ -19,6 +21,7 @@
 import { cookieTypes } from 'lib/types/session-types.js';
 import { defaultConnectionInfo } from 'lib/types/socket-types.js';
 import { defaultGlobalThemeInfo } from 'lib/types/theme-types.js';
+import type { ClientDBThreadInfo } from 'lib/types/thread-types.js';
 import { parseCookies } from 'lib/utils/cookie-utils.js';
 import { isDev } from 'lib/utils/dev-utils.js';
 import { wipeKeyserverStore } from 'lib/utils/keyserver-store-utils.js';
@@ -28,6 +31,10 @@
 } from 'lib/utils/migration-utils.js';
 import { entries } from 'lib/utils/objects.js';
 import { resetUserSpecificState } from 'lib/utils/reducers-utils.js';
+import {
+  convertClientDBThreadInfoToRawThreadInfo,
+  convertRawThreadInfoToClientDBThreadInfo,
+} from 'lib/utils/thread-ops-utils.js';
 
 import commReduxStorageEngine from './comm-redux-storage-engine.js';
 import { defaultWebState } from './default-state.js';
@@ -262,6 +269,52 @@
       return handleReduxMigrationFailure(state);
     }
   },
+  [12]: async (state: AppState) => {
+    // 1. Check if `databaseModule` is supported and early-exit if not.
+    const sharedWorker = await getCommSharedWorker();
+    const isDatabaseSupported = await sharedWorker.isSupported();
+
+    if (!isDatabaseSupported) {
+      return state;
+    }
+
+    // 2. Get existing `stores` from SQLite.
+    const stores = await sharedWorker.schedule({
+      type: workerRequestMessageTypes.GET_CLIENT_STORE,
+    });
+    invariant(stores?.store, 'Stores should exist');
+    const threads: $ReadOnlyArray<ClientDBThreadInfo> = stores.store.threads;
+
+    if (threads.length === 0) {
+      return state;
+    }
+
+    // 3. Convert to `RawThreadInfo`, patch in `specialRole`, and convert back.
+    const patchedClientDBThreadInfos: $ReadOnlyArray<ClientDBThreadInfo> =
+      threads
+        .map(convertClientDBThreadInfoToRawThreadInfo)
+        .map(patchRawThreadInfoWithSpecialRole)
+        .map(convertRawThreadInfoToClientDBThreadInfo);
+
+    // 4. Construct operations to remove existing threads and replace them
+    //    with threads that have the `specialRole` field patched in.
+    const threadStoreOperations: ClientDBThreadStoreOperation[] = [];
+    threadStoreOperations.push({ type: 'remove_all' });
+    for (const clientDBThreadInfo: ClientDBThreadInfo of patchedClientDBThreadInfos) {
+      threadStoreOperations.push({
+        type: 'replace',
+        payload: clientDBThreadInfo,
+      });
+    }
+
+    // 5. Process the constructed `threadStoreOperations`.
+    await sharedWorker.schedule({
+      type: workerRequestMessageTypes.PROCESS_STORE_OPERATIONS,
+      storeOperations: { threadStoreOperations },
+    });
+
+    return state;
+  },
 };
 
 const migrateStorageToSQLite: StorageMigrationFunction = async debug => {