Hi,
I assume you wanted to map Pamulang Equestrian Centre. If there is just one equestrian centre then please do not map 3 areas with tag leisure=horse_riding for that but only one for the whole centre. See https://wiki.openstreetmap.org/wiki/Tag:leisure=horse_riding#When_not_to_use . A pasture for horses can be tagged landuse=meadow + meadow=pasture (+ optional
landcover=grass), see https://wiki.openstreetmap.org/wiki/Riding