The recreation of a standby database failed with the following error:
RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of restore command at 04/23/2018 16:44:52 ORA-19870: error while restoring backup piece 7lt12h1l_1_1 ORA-19573: cannot obtain exclusive enqueue for datafile 201
DG Broken was still on, the solution was, using DGMGRL, to disable the redo apply of the standby database:
DGMGRL> edit database '<standby>' set state='APPLY-OFF';