diff --git a/app/store/app.ts b/app/store/app.ts
index da0e886f..8d875fee 100644
--- a/app/store/app.ts
+++ b/app/store/app.ts
@@ -478,7 +478,7 @@ export const useChatStore = create<ChatStore>()(
           n - config.historyMessageCount,
         );
         const longTermMemoryMessageIndex = session.lastSummarizeIndex;
-        const oldestIndex = Math.min(
+        const oldestIndex = Math.max(
           shortTermMemoryMessageIndex,
           longTermMemoryMessageIndex,
         );