diff --git a/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts b/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts
index 7395cfcd42..95a9cd88e4 100644
--- a/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts
+++ b/packages/frontend/core/src/blocksuite/ai/peek-view/chat-block-peek-view.ts
@@ -334,6 +334,7 @@ export class AIChatBlockPeekView extends LitElement {
       const last = messages[messages.length - 1];
       if ('content' in last) {
         last.content = '';
+        last.id = '';
         last.createdAt = new Date().toISOString();
       }
       this.updateContext({ messages, status: 'loading', error: null });