Hi, IMHO this is vandalism, you cannot delete several aspects of the Piazza Navona (the square and the pedestrian area) https://www.openstreetmap.org/relation/9202510/
https://www.openstreetmap.org/relation/5150439/
without asking anybody, on your mobile phone, and add some more tags to a way https://www.openstreetmap.org/way/4247138/ which isn't all "pedestrian area" because there are fountains and other objects on the square.