ORA-19693: backup piece already included



Encounter the following errors when trying to duplicate the database to another server using the RMAN backup:

ORA-19693: backup piece E:RMAN_BACKUPxxxxxxxxxxx already included


The location of the RMAN backup pieces at the target and auxiliary/duplicate databases are
different. So, RMAN cannot see the RMAN backup pieces, because they are stored in a different directory at the auxiliary/duplicate database server.

Try with below command which may resolve issue
RMAN> catalog start with ‘E:RMAN_BACKUP’;

Thank You !!