User blog comment:MisterWoodhouse/Pausing UCP migrations to resolve some critical blockers/@comment-45789670-20200831141057/@comment-24006128-20200831141303

You seem confused about this.

UCP is an install of MediaWiki 1.33 with Fandom-specific add-ons.

None of Gamepedia is on it. Gamepedia is on its own install of MediaWiki 1.33 and has not yet begun migrations.