Generate Warning that system has been downgraded
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Label this issue](https://contributors.gitlab.com/manage-issue?action=label&projectId=278964&issueIid=27257) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=27257) </details> <!--IssueSummary end--> I made this in CE as I think it affects all distributions. Until https://gitlab.com/gitlab-org/gitlab-ce/issues/57982 gets proven, we should figure out a way to alert customers that they have rolled back and that this is _dangerous_. Maybe based on migrations or something, but yeah, it won't be happy times for now. @marin I think you are the right person to chime in?
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