After implementing https://gitlab.com/gitlab-org/gitlab-ce/issues/59457 the step of ignoring the column was missing. Here are the [steps](https://gitlab.com/gitlab-org/gitlab-ce/issues/59457#note_191309927) which need to be implemented in order to [ignore and drop](https://docs.gitlab.com/ee/development/what_requires_downtime.html#dropping-columns) the `MergeRequest#assignee_id` column Before doing this we need the following issues to be addressed: - https://gitlab.com/gitlab-org/gitlab/issues/37694 - https://gitlab.com/gitlab-org/gitlab/issues/37695