The following errors occur when creating a CDB database with patch level 19.23.

ERROR=RMAN-00571: =======================================================
ERROR=RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS 
ERROR=RMAN-00571: ============================================
ERROR=ORA-04062: signature of package "SYS.DBMS_BACKUP_RESTORE" has been changed

SEVERE: [FATAL] Error while restoring PDB backup piece
oracle.sysman.assistants.util.step.StepExecutionException: Error while restoring PDB backup piece

WORKAROUND

As a workaround, by selecting the “Custom database” option instead of “General Purpose Database”.