I'm not sure what you're so confused by – just look at the way's history and the comments underneath these changes.
https://www.openstreetmap.org/way/198764123/history

To summarize, the discussion for the new criteria for the highway=trunk tag has not yet been finished so please don't make undiscussed changes.
https://community.openstreetmap.org/t/stosowanie-tagu-highway-trunk-w-polsce/122106