You mapped 4 additional horse highlines with tag leisure=horse_riding: 
https://www.openstreetmap.org/node/12613530437
https://www.openstreetmap.org/node/12613449774
https://www.openstreetmap.org/node/12613455055
https://www.openstreetmap.org/node/12613623742

Horse highlines are no riding centers; tagging them with leisure=horse_riding is a misuse of this tag. I made a suggestion how they could be tagged above.

Can you please stop tagging horse highlines as horse riding centers?