RMAN-05170
Plugin datafile string (string) cannot be created during recovery and will be offlined.
Cause
Specified datafile is a plugin datafile and cannot be recreated by RMAN during recovery. Plugin datafiles are datafiles present in a PDB when it is created within this CDB context.
Action
The datafile will be added to the controlfile after open resetlogs. If needed at the end of recovery, use any available backups to restore and recover the datafiles. If not needed, drop the PDB or tablespace after database open.