KVM Live Migration- VM is already active
Solution 1:
This error is coming from a hook script, not from libvirt itself. So it is a script that you or another admin added to the hypervisor.
The script called when libvirt tries to migrate a VM (and also start/stop a VM) is /etc/libvirt/hooks/qemu. If the script exits with an error, migration is aborted. Check this script to find out why it failed.