oupson

Not working on /summon or /give, minecraft 1.16.1

Example command :

/summon minecraft:horse ~ ~1 ~ {Health:50,Attributes:[{Name:"generic.maxHealth",Base:50}
,{Name:"generic.movementSpeed",Base:10f},{Name:"horse.jumpStrength",Base:2f}],SaddleItem:{id:saddle,Count:1},Tame:1}

/give @p horse_spawn_egg{EntityTag:{id:"minecraft:horse",Health:50,Attributes:[{Name:"generic.maxHealth",Base:50}
,{Name:"generic.movementSpeed",Base:10f},{Name:"horse.jumpStrength",Base:2f}],SaddleItem:{id:saddle,Count:1},Tame:1}}

 Logs :

[Server thread/WARN] [minecraft/AttributeModifierManager]: Ignoring unknown attribute 'generic.maxHealth'
[Server thread/WARN] [minecraft/AttributeModifierManager]: Ignoring unknown attribute 'generic.movementSpeed'
[Server thread/WARN] [minecraft/AttributeModifierManager]: Ignoring unknown attribute 'horse.jumpStrength'