I've also had the same issue after an update from ubuntu 20.04 to ubuntu 22.04 with udev (249.11-0ubuntu3.11).
Just as an additional note on how to mitigate if someone stumbles over this.
1. remove the group: sudo groupdel kvm 2. Then run upgrade again: sudo apt upgrade
On udev installation the group can then be successfully installed as a system group.
Please check beforehand whether any user was a member of that group "kvm" and re-add afterwards.
I've also had the same issue after an update from ubuntu 20.04 to ubuntu 22.04 with udev (249.11- 0ubuntu3. 11).
Just as an additional note on how to mitigate if someone stumbles over this.
1. remove the group: sudo groupdel kvm
2. Then run upgrade again: sudo apt upgrade
On udev installation the group can then be successfully installed as a system group.
Please check beforehand whether any user was a member of that group "kvm" and re-add afterwards.