[libvirt-users] Libvirt event for disk change is not being registered by DomainEventRegisterAny()

Hi, I am writing an application which would monitor the changes on the domain on the KVM hypervisor through libvirt events. Recently I have upgraded my libvirt from 9.4 to 9.10 and I have this issue. While *de-registering* for DomainEventDiskChangeCallback, I get a libvirt error saying 'libvirtError: internal error domain event 2 not registered;' where 2 is the callbackid returned by virConnectDomainEventRegisterAny() for the disk change event type. This error didn’t occur when I used libvirt 0.9.4-23.el6_2.6 Can you please enlighten me on the recent changes that has been made? Also, is the diskchange event a part of the domains life cycle event? Any help on this issue will be highly appreciated. Thanks and regards, Abhishek