diff --git a/txpool/pool.go b/txpool/pool.go
index 1baf4afa3..fb2e4b06c 100644
--- a/txpool/pool.go
+++ b/txpool/pool.go
@@ -607,7 +607,7 @@ func (sc *SendersCache) flush(tx kv.RwTx, byNonce *ByNonce, sendersWithoutTransa
 			return err
 		}
 	}
-
+	fmt.Printf("last sender id:%d\n", sc.senderID)
 	sc.senderIDs = map[string]uint64{}
 
 	v := make([]byte, 8, 8+32)