RMAN-05657：There are multiple database IDs present.
错误码
错误描述：There are multiple database IDs present.
错误原因：There were multiple database IDs present in the BACKUP LOCATION specified. RMAN did not know which database ID to use for the DUPLICATE command.
解决方法：Use the SET DBID command to specify the database ID before the DUPLICATE command and retry the command.
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