Under the procedure, I've warned about gitlab-shell version, which should be 2.6.12 (may be some minor revisions introduces that).

This must be an error as the sentence doesn't make sense otherwise

Using db:reset ensures existing tables are first dropped. This in turn
ensures that we can drop tables regardless of any foreign key
constraints. While CE currently doesn't have any foreign keys EE defines
the following relation:

    remote_mirrors.project_id -> projects.id

MySQL will complain whenever you try to drop the "projects" table first
even when using "DROP TABLE ... CASCADE".

[ci skip]

The grafana-dashboards repository now contains _all_ GitLab.com
dashboards and thus requires some extra continuous queries to be set up.
The repository now also provided a way to automatically import/export
dashboards.

[ci skip]

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/15203

[ci skip]