In MediaWiki 1.29, there is a new feature called user group expiry. Shouldn't the page Manual:User groups table then be updated? The previous schema summary should say {{TNT|MW version|version=1.22|version2=1.28}} and the current one (with a new column named "ug_expiry") should say {{TNT|MW version|version=1.29|comment=and after}}. The "fields" section should also be updated to include the new feature.
Topic on Project:Village Pump
Please update it since you know what changed and when :)
I gone ahead and made the changes myself.
And marked for translation. Thanks for the updates!