Hi,
I think, version #1 of https://www.openstreetmap.org/way/1158569480/history was better than version #2; this area isn't large enough for horse_racing. And the tag leisure=horse_riding is not for stables, indoor arenas, etc. but for the whole facility, so I think it is misplaced on https://www.openstreetmap.org/way/1158569477 and https://www.openstreetmap.org/way/1158569478
Compare
https://wiki.openstreetmap.org/wiki/Tag:leisure%3Dhorse_riding