diff --git a/pkg/common/db/batch_insert_chat.go b/pkg/common/db/batch_insert_chat.go
index eec173897..8ef1117a2 100644
--- a/pkg/common/db/batch_insert_chat.go
+++ b/pkg/common/db/batch_insert_chat.go
@@ -31,8 +31,9 @@ func (d *DataBases) BatchInsertChat(userID string, msgList []*pbMsg.MsgDataToMQ,
 	var remain uint64
 	if currentMaxSeq < uint64(GetSingleGocMsgNum()) {
 		remain = uint64(GetSingleGocMsgNum()-1) - (currentMaxSeq % uint64(GetSingleGocMsgNum()))
+	} else {
+		remain = uint64(GetSingleGocMsgNum()) - (currentMaxSeq % uint64(GetSingleGocMsgNum()))
 	}
-	remain = uint64(GetSingleGocMsgNum()) - (currentMaxSeq % uint64(GetSingleGocMsgNum()))
 	insertCounter := uint64(0)
 	msgListToMongo := make([]MsgInfo, 0)
 	msgListToMongoNext := make([]MsgInfo, 0)