http_publish_uri never updated

We have a unit that received a different IP address from DHCP than it had when it was first deployed. This was apparently due to a the unit's host going down for long enough for the lease to expire but whatever the reason, the IP in http_publish_uri in /var/snap/graylog/common/server.conf no longer matches the IP on the unit's interface.

I tried running the config-changed hook and a few other things to no avail.

I finally was able to get the IP updated by clearing the graylog.configured flag.

juju run -u graylog/2 charms.reactive clear_flag graylog.configured