[ovirt-users] ERROR HSMGetAllTasksStatusesVDS Cannot deactivate Logical Volume:

Hello environment: oVirt 4.5.4-1 messages like this appear in the event log what do these errors mean? the volume 114f08c4-f864-44e1-a937-19405307e643 has 128m size ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-18) [] EVENT_ID: VDS_BROKER_COMMAND_FAILURE(10,802), VDSM kvm3 command HSMGetAllTasksStatusesVDS failed: value=Cannot deactivate Logical Volume: 'error=General Storage Exception: ("5 [] [\' Logical volume 3526ebaa-31de-4c9f-b724-f0fbe5448a78/114f08c4-f864-44e1-a937-19405307e643 in use.\']\\n3526ebaa-31de-4c9f-b724-f0fbe5448a78/[\'114f08c4-f864-44e1-a937-19405307e643\']",), users={\'/dev/3526ebaa-31de-4c9f-b724-f0fbe5448a78/114f08c4-f864-44e1-a937-19405307e643\': [{\'pid\': 2227780, \'command\': \'systemd-udevd\', \'user\': \'root\', \'fd\': 7}]}' abortedcode=552