diff --git a/dagflow/dagflow.py b/dagflow/dagflow.py
index 54abe97..90a4ce6 100644
--- a/dagflow/dagflow.py
+++ b/dagflow/dagflow.py
@@ -546,7 +546,7 @@ where instance_id=${instance_id}$
 			ne = recs[0]
 			inst_id = ne.instance_id
 			insts = await sor.R('flow_instance', {'id': inst_id})
-			if insts
+			if insts:
 				debug(f'{inst_id=} 没找到flow_instance记录')
 				return
 			inst = insts[0]