Alerts shows WrongActivatedLogicalVolume warnings.
Log into the Hypervisor the log lists (this will be in the heading of the error log) and find the disk:
lvscan |grep <disk_identifier>
(the disk identifier will be in the log body)
That command will show you the full disk path that will be needed to deactivate the disk.
lvchange -a n <disk_path>
That will deactivate the disk and stop the error messages from showing in the Log Page.
Note - if this is seen during a hot migration then it should clear itself once the migration has been completed.
This error occurs when a disk is active on a hypervisor where it should not be active.