Hi,
https://www.openstreetmap.org/way/1234122646 looks like a riding arena and not like a riding centre (leisure=horse_riding). Riding arenas are usually tagged leisure=pitch + sport=equestrian. In JOSM you can use the preset for sport=equestrian to do that. Compare https://wiki.openstreetmap.org/wiki/Tag%3Aleisure%3Dhorse_riding