diff --git a/backend/app/api/routers/chat.py b/backend/app/api/routers/chat.py
index d014626..abe77eb 100644
--- a/backend/app/api/routers/chat.py
+++ b/backend/app/api/routers/chat.py
@@ -59,6 +59,8 @@ async def chat(
         event_handler = EventCallbackHandler()
         chat_engine.callback_manager.handlers.append(event_handler)  # type: ignore
 
+        # 由于基于历史消息的提示词没有调整好，所以暂时屏蔽历史消息
+        messages = None
         response = await chat_engine.astream_chat(last_message_content, messages)
         process_response_nodes(response.source_nodes, background_tasks)