diff --git a/pkg/provider/runners/difysvapi.py b/pkg/provider/runners/difysvapi.py
index 6e47ccb8..ba8e5110 100644
--- a/pkg/provider/runners/difysvapi.py
+++ b/pkg/provider/runners/difysvapi.py
@@ -229,7 +229,7 @@ class DifyServiceAPIRunner(runner.RequestRunner):
 
         cov_id = query.session.using_conversation.uuid
 
-        plain_text, image_ids, timestamp = await self._preprocess_user_message(query)
+        plain_text, image_ids = await self._preprocess_user_message(query)
 
         # 尝试获取 CreateTime
         create_time = 0