You cannot submit this command while a repair action is in progress for the virtual disk (VDisk).
Use the svcinfo lsrepairvdiskcopyprogress command to view the repair progress. Wait for the virtual disk repair process to complete. If you want the repair process to complete more quickly, increase the rate by submitting an svctask chvdisk command. Once the repair action has completed, resubmit the command that caused this error.