Comment 6 for bug 1928383

If I'm reading this correctly, this upgrade has missed one of the key pre-upgrade requirements(https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/upgrade-series.html#pre-upgrade-requirements): "All currently deployed charms should be upgraded to the latest stable charm revision." Over the last two years, many improvements have been made to the charms in regards to how they handle upgrading things, from the charms themselves, to OpenStack, to Ubuntu.