RMAN-05048：specified file name string conflicts with a file used by the target database
错误码
错误描述：specified file name string conflicts with a file used by the target database
错误原因：The specified file name was already in use by another data file in the database.
解决方法：Use SET NEWNAME command to specify a different name for the data file that does not conflict with a file name in use by the target database.
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