@mnordine really sorry for the long delay in responding,
Here are a couple of links that might help with similar issues
- https://forum.gitlab.com/t/panic-the-database-schema-version-of-1-1-0-cannot-be-upgraded-you-must-not-skip-a-version/2122/8
- https://gitlab.com/gitlab-org/gitlab-mattermost/issues/50
Let us know if the above helps resolve the issues or not,