diff --git a/src/plugins/utils/statistic.py b/src/plugins/utils/statistic.py
index 4b9afff39..10133f2b7 100644
--- a/src/plugins/utils/statistic.py
+++ b/src/plugins/utils/statistic.py
@@ -138,6 +138,7 @@ class LLMStatistics:
             # user_id = str(doc.get("user_info", {}).get("user_id", "unknown"))
             chat_info = doc.get("chat_info", {})
             user_info = doc.get("user_info", {})
+            user_id = str(user_info.get("user_id", "unknown"))
             message_time = doc.get("time", 0)
             group_info = chat_info.get("group_info") if chat_info else {}
             # print(f"group_info: {group_info}")