diff --git a/models/db/engine.go b/models/db/engine.go
index 71197153e5..5d8e9f3ad8 100755
--- a/models/db/engine.go
+++ b/models/db/engine.go
@@ -167,6 +167,7 @@ func SyncAllTables() error {
 	}
 	_, err = x.StoreEngine("InnoDB").SyncWithOptions(xorm.SyncOptions{
 		WarnIfDatabaseColumnMissed: true,
+		IgnoreDropIndices:          true,
 	}, sortedTables...)
 	return err
 }