EE schema backport re-creates formerly removed column
We merged an EE MR to remove users.support_bot
column and indexes in https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/12620/diffs. The migration has been deployed to GitLab.com, yet the column and its indexes still exist.
Upon investigation with @splattael , we found the enterprise schema backport migration 20190402150158_backport_enterprise_schema
re-created the column and its indexes. Timing-wise, the backport migration and the original one are close, so there might have been an inconsistency in terms of what needed to be backported and what was intentionally missing.
This came from work in https://gitlab.com/gitlab-org/gitlab-ce/issues/66770.