必須序列化資料庫上的備份和檔案操作作業 (如 ALTER DATABASE ADD FILE)。請在目前的備份或檔案操作作業完成之後，重新發出陳述式。

Backup and file manipulation operations (such as ALTER DATABASE ADD FILE) on a database must be serialized. Reissue the statement after the current backup or file manipulation operation is completed.