Comment 2 for bug 1879573

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Ian Booth (wallyworld) wrote : Re: k8s model upgrade rc1 to rc2 on rc2 LXD controller requires --agent-version

Juju uses --agent-stream similar to how snap uses --channel.
When you run upgrade-controller, Juju will filter the agents it selects from based on the user's desired level of risk; that's why juju doesn't work it out for itself; it must be a user driven decision.

It does look like there's an issue though in that --agent-stream proposed should not have presented "2.9-beta1.3650" as a choice.