[ovirt-users] clear tasks from WebUI

Hi oVirt 4.2.5.2-1.el7 I tried to delete an Illegal vm disk and that failed. Then I completely remove the VM who had that broken disk. But task is stuck in the WebUI from my previous disk deletion attempt vdsm-client Host getAllTasksInfo on the SPM host, shows no tasks. How do I clear the tasks from the WebUI?