Using Maas 2.6.2-7841-ga10625be3-0ubuntu1~18.04.1 from http://ppa.launchpad.net/maas/stable/ubuntu bionic/main, when I added the ‘focal’ image where previously it was just ‘18.04’ and ‘16.04’, the Maas GUI became unusable as every page returns
'<' not supported between instances of 'NoneType' and 'str'.
I don’t see a way using the CLI to delete the ‘focal’ image, which leaves me unable to use Maas via GUI any longer. Any suggestions for a workaround other than upgrading (which is a much larger task)? I’m OK to just remove the focal image (in this particular case) if that’s possible, in the gui I would just unselect it but I can no longer access that page.
Note this looks very much like https://bugs.launchpad.net/maas/+bug/1902867 but this is a Bionic system in production and upgrading to the snap is a project in itself. Just ticking the box for a new image shouldn’t result in the GUI being unusable.