[ovirt-users] Problem remove snapshot

hello, i have problem for delete one snapshot. i see the error: Due to partial snapshot removal, Snapshot 'Backup the VM' of VM 'vmname' now contains only the following disks: 'vmdiskname'. Failed to delete snapshot 'Backup the VM' for VM 'vmname'. information in db : imagestatus | storage_pool_id | storage_domain_id | image_group_id | im age_guid | parentid -------------+--------------------------------------+--------------------------------------+--------------------------------------+---------------- ----------------------+-------------------------------------- 1 | 77e24b20-9d21-4952-a089-3c5c592b4e6d | 6e5cce71-3438-4045-9d54-607123e0557e | bfb1e6b5-7a06-41e4-b8b4-2e237ed0c7ab | 1bb7bd08-5ee8-4 a3b-8978-c15e15d1c5e4 | 6008671c-2f9d-48de-94f3-cc7d6273de31 4 | 77e24b20-9d21-4952-a089-3c5c592b4e6d | 6e5cce71-3438-4045-9d54-607123e0557e | bfb1e6b5-7a06-41e4-b8b4-2e237ed0c7ab | 6008671c-2f9d-4 8de-94f3-cc7d6273de31 | 00000000-0000-0000-0000-000000000000 output the script vm-disk-info.py Disk bfb1e6b5-7a06-41e4-b8b4-2e237ed0c7ab (sd:6e5cce71-3438-4045-9d54-607123e0557e) Warning: volume 1bb7bd08-5ee8-4a3b-8978-c15e15d1c5e4 is in chain but illegal Volumes: 6008671c-2f9d-48de-94f3-cc7d6273de31 1bb7bd08-5ee8-4a3b-8978-c15e15d1c5e4 output the command md5sum : volume : 1bb7bd08-5ee8-4a3b-8978-c15e15d1c5e4 4c05c8258ed5746da6ac2cdb80c8974e 1bb7bd08-5ee8-4a3b-8978-c15e15d1c5e4 ec74d4d8189a5ea24720349868ff7ab7 1bb7bd08-5ee8-4a3b-8978-c15e15d1c5e4 the volume change output the command md5sum : volume: 6008671c-2f9d-48de-94f3-cc7d6273de31 86daf229ad0b65fb8be3a3de6b0ee840 6008671c-2f9d-48de-94f3-cc7d6273de31 86daf229ad0b65fb8be3a3de6b0ee840 6008671c-2f9d-48de-94f3-cc7d6273de31 the volume not change Thanks.