Comment 1 for bug 1922292

Change https://code.launchpad.net/~llama-charmers/charm-juju-controller/+git/charm-juju-controller/+merge/406258 was merged, but we still have an issue with charm upgrades, where the old, not working check for juju-db is left behind on charm upgrade.

I'll set this to low priority now, as the main fix has been implemented.