I messd whit the /summon comand and i got a horse whit zomdie sadle and a cheast and i try to put stuff in it but it craz me game

I messd whit the /summon comand and i got a horse whit zomdie sadle and a cheast and i try to put stuff in it but it craz me game

1.I did this command /summon EntityHorse ~ ~1 ~-3

{Type:0,Tame:1,Saddle:1,ChestedHorse:1}

OR

{Type:,Tame:1,Saddle:1,ChestedHorse:1}

OR

{Type:4,Tame:1,Saddle:1,ChestedHorse:1}

2.I go and ride the horse and I put a cobble stone in the cheast and it crazes
I got screenshot too