Redmine

I use Docker. I testet this with "redmine" and "redmine:5". Testet with 6.0.2 and an 5.1.5.

With 5.1.4 it works

Unknown database adapter `"mysql2"` found in config/database.yml, use Gemfile.local to load your own database gems
pm1.de1.dbe.academy  | Your Gemfile lists the gem puma (>= 0) more than once.
pm1.de1.dbe.academy  | You should probably keep only one of them.
pm1.de1.dbe.academy  | Remove any duplicate entries and specify the gem only once.
pm1.de1.dbe.academy  | While it's not a problem now, it could cause errors if you change the version of one of them later.
pm1.de1.dbe.academy  | The Gemfile's dependencies are satisfied
pm1.de1.dbe.academy  | Unknown database adapter `"mysql2"` found in config/database.yml, use Gemfile.local to load your own database gems
pm1.de1.dbe.academy  | rake aborted!
pm1.de1.dbe.academy  | LoadError: Error loading the 'mysql2' Active Record adapter. Missing a gem it depends on? mysql2 is not part of the bundle. Add it to your Gemfile. (LoadError)