diff --git a/models/repo/mirror.go b/models/repo/mirror.go
index 9bf4fedd31..1069943d40 100644
--- a/models/repo/mirror.go
+++ b/models/repo/mirror.go
@@ -27,7 +27,7 @@ type Mirror struct {
 
 	UpdatedUnix    timeutil.TimeStamp `xorm:"INDEX"`
 	NextUpdateUnix timeutil.TimeStamp `xorm:"INDEX"`
-	LastSyncUnix   timeutil.TimeStamp `xorm:"last_sync_unix INDEX"`
+	LastSyncUnix   timeutil.TimeStamp `xorm:"INDEX"`
 
 	LFS         bool   `xorm:"lfs_enabled NOT NULL DEFAULT false"`
 	LFSEndpoint string `xorm:"lfs_endpoint TEXT"`