User blog comment:Rappy 4187/Technical Update: August 16, 2017/@comment-32876421-20170816225707/@comment-2200849-20170817081836

The version of Semantic MediaWiki that will be replaced is 2.4.1. 2.4.6 is simply a minor maintenance release of the 2.4 branch - I've compiled a detailed changelog from upstream release notes which contain the changes included in this update.