Hello, After an upgrade (I think it was from version 8.1 to 8.3), my Mattermost doesn’t start/work anymore. I get the following messages in /var/log/gitlab/mattermost/current each second: panic: The database schema version of 1.1.0 cannot be upgraded. You must not skip a version. and then some Go…

Panic: The database schema version of 1.1.0 cannot be upgraded. You must not skip a version

bvamos January 18, 2016, 7:47am 8

The easiest was is described here added by bedotech:

Note: run su - mattermost before doing this.