Update tokenization_minicpm.py

tokenization_minicpm.py

@@ -366,6 +366,8 @@ func2(params)
         tools_string = ""
 
     if add_to_system:
+        if len(messages) > 0 and messages[0]["role"] != "system":
+            messages.insert(0, {"role": "system", "content": ""})
         return [message_format(msg, system_suffix=tools_string, user_prefix="") for msg in messages]
     else:
         return [message_format(msg, system_suffix="", user_prefix=tools_string) for msg in messages]