diff --git a/backend/signal_engine.py b/backend/signal_engine.py
index c5ce9b2..33dcb36 100644
--- a/backend/signal_engine.py
+++ b/backend/signal_engine.py
@@ -787,10 +787,6 @@ def paper_open_trade(
     )
 
 
-
-            conn.commit()
-
-
 def paper_has_active_position(symbol: str, strategy: Optional[str] = None) -> bool:
     """检查该币种是否有活跃持仓"""
     with get_sync_conn() as conn: