Hi and welcome to OSM! I noticed that as part of this changeset you added building=school to the three areas tagged as amenity=school. That building=* tag should be used only for features that are themselves a building. When added to the school grounds, that would suggest that the whole property is encased in one large building that overlaps the school buildings already on the map. I've corrected these by removing the building=* tags and wanted you to know for the future. Thanks!