I have the same problem. In my case, it is caused by upgrading the NVIDIA driver metapackage to 510 from 470.
I am very grateful to @lockszmith for sharing his steps on https://askubuntu.com/questions/1388997/zsys-commit-service-fails-with-couldnt-promote-dataset-not-a-cloned-filesy
It really makes me very wary of upgrading my systems. Those are LTS releases and things like this are very concerning.
I have the same problem. In my case, it is caused by upgrading the NVIDIA driver metapackage to 510 from 470.
I am very grateful to @lockszmith for sharing his steps on https:/ /askubuntu. com/questions/ 1388997/ zsys-commit- service- fails-with- couldnt- promote- dataset- not-a-cloned- filesy
It really makes me very wary of upgrading my systems. Those are LTS releases and things like this are very concerning.