Hi,
https://www.openstreetmap.org/way/1257104828 is NO riding centre (Centro equestre/Centro ippico), it is a riding arena. iD has a preset for riding arenas with Italian name "Arena per equitazione"; this sets the correct tags leisure=pitch + sport=equestrian. Example: https://www.openstreetmap.org/way/867703584.

See also https://www.openstreetmap.org/changeset/148008584