I hit this today. I noticed, however, that I can indeed switch to the "destroyed" model.
$ dpkg-query -W juju-core2 juju-core2 2.0-beta1-0ubuntu1~16.04.1~juju1
I hit this today. I noticed, however, that I can indeed switch to the "destroyed" model.
$ dpkg-query -W juju-core2 0ubuntu1~ 16.04.1~ juju1
juju-core2 2.0-beta1-