Comment 10 for bug 1818045

Thanks, I have updated the juju client to 2.6-rc2. I guess I need to upgrade the controller as well, but the "juju upgrade-controller" command does not allow me to specify a beta/candidate release, and it's stuck to 2.5.4.

My current (working) k8s model has 3 machines in stopped state which were previously used by worker units that I have removed. I tried to remove --force them without success.

How do I upgrade the controller to 2.6?
Thanks