不自动load未登录用户的history

modules/models/base_model.py

@@ -569,6 +569,8 @@ class BaseLLMModel:
             return filename, self.system_prompt, gr.update()
 
     def auto_load(self):
+        if self.user_identifier == "":
+            return self.system_prompt, gr.update()
         history_file_path = get_history_filepath(self.user_identifier)
         filename, system_prompt, chatbot = self.load_chat_history(history_file_path, self.user_identifier)
         return system_prompt, chatbot