diff --git a/routes/chat.py b/routes/chat.py
index e243900..e1296fd 100644
--- a/routes/chat.py
+++ b/routes/chat.py
@@ -528,7 +528,7 @@ async def create_agent_and_generate_response(
     # 准备最终的消息
     final_messages = messages.copy()
     final_messages = append_user_last_message(final_messages, f"\n\nlanguage:{get_language_text(language)}")
-
+    pre_message_list = []
     if guideline_analysis:
         final_messages = append_user_last_message(final_messages, f"\n\nActive Guidelines:\n{guideline_analysis}\nPlease follow these guidelines in your response.")
         pre_message_list.append({"role": "assistant","reasoning_content": guideline_analysis+ "\n"})