[ovirt-users] Left over hibernation disks that we can't delete

After putting the VMs in our environment into hibernation, one of the VMs that came out of hibernation still has the metadata and memory dumb hanging around as 2 disks with status ok. They are not attached to any VM but we are unable to delete them. The VM in question came out of the hibernation without any issues. If they are no longer required how can we tidy them up? Thanks, James