無法執行資料庫 "%1" 的差異備份，因為目前的資料庫備份不存在。請重新發出 BACKUP DATABASE，省略 WITH DIFFERENTIAL 選項，以執行完整的資料庫備份。
Click to search this error in Google
English version
Cannot perform a differential backup for database "%1", because a current database backup does not exist. Perform a full database backup by reissuing BACKUP DATABASE, omitting the WITH DIFFERENTIAL option.
SQL Server