Reverted. You have changed name to wrong format. It should be "Зубчаниновка 443050" https://wiki.openstreetmap.org/wiki/RU:Tag:amenity%3Dpost_office and object like post offices or shops are easier to edit if they are nodes instead of adding tags to building. It is easier to delete them then they are closed and easier to add other pois if something would open in the same building  