diff --git a/pump/storage/storage.go b/pump/storage/storage.go
index 62bb4a495..7cb682c3e 100644
--- a/pump/storage/storage.go
+++ b/pump/storage/storage.go
@@ -667,7 +667,6 @@ func (a *Append) doGCTS(ts int64) {
 	iter := a.metadata.NewIterator(irange, nil)
 
 	for {
-
 		nStr, err := a.metadata.GetProperty("leveldb.num-files-at-level0")
 		if err != nil {
 			log.Error("get `leveldb.num-files-at-level0` property failed", zap.Error(err))