A volume list cannot be deleted for boot recovery media. A volume list must exist for each boot recovery media defined to the server.
The server does not process the command.
To delete the volume list, issue an UPDATE RECOVERYMEDIA command and specify a recovery media type of OTHER and VOLUMES="". To change the recovery media type to BOOT, issue an UPDATE RECOVERYMEDIA command and specify the volume list containing the boot recovery media and TYPE=BOOT.