Prior to the Wallaby (23.0.0) release thelibvirt.hw_machine_type option had to remain static onceset for the lifetime of a deployment. This was due to the machine type ofinstances without a hw_machine_type image property using the newlyconfigured machine types after a hard reboot or migration This could in turnbreak the internal ABI of the instance when changing between underlying machinetypes such as pc to q35.