diff --git a/src/store/migrate.ts b/src/store/migrate.ts
index 1b777a2..3e53c2e 100644
--- a/src/store/migrate.ts
+++ b/src/store/migrate.ts
@@ -1,5 +1,9 @@
 import { LocalStorageInterface } from '@type/chat';
+import { defaultChatConfig } from '@constants/chat';
 
 export const migrateV0 = (persistedState: LocalStorageInterface) => {
-  persistedState.chats.forEach((chat) => (chat.titleSet = false));
+  persistedState.chats.forEach((chat) => {
+    chat.titleSet = false;
+    if (!chat.config) chat.config = { ...defaultChatConfig };
+  });
 };