【SQL Server】System.Data.SqlClient.SqlError: The media loaded on “××ד is formatted to support 2

1、备份数据库时候报错

TITLE: Microsoft SQL Server Management Studio
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Backup failed for Server 'WIN-EHHMKN3QBO6'.  (Microsoft.SqlServer.SmoExtended)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2100.60+((SQL11_RTM).120210-1917+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Backup+Server&LinkId=20476

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ADDITIONAL INFORMATION:

System.Data.SqlClient.SqlError: The media loaded on "C:\AZ\DB\WWALMDB_BK" is formatted to support 2 media families, but 3 media families are expected according to the backup device specification. (Microsoft.SqlServer.Smo)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2100.60+((SQL11_RTM).120210-1917+)&LinkId=20476

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BUTTONS:

OK
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2、解决办法

3、官方参考链接

sql - Backup failed for Server, The media is formatted to support 2 media families Error - Stack Overflow