I reverted the change using http://revert.osmz.ru/ (https://revert.monicz.dev/ did not let me because I need 10 edits to use it). Here's the reverting changeset: https://www.openstreetmap.org/changeset/147134997.
I hope this repaired things for https://www.openstreetmap.org/way/397937158 and https://www.openstreetmap.org/way/30499962.

Now I need to figure out how to correctly declare that https://www.openstreetmap.org/way/177665619 is actually a school (https://www.espmaritime.be/).