Hello to people who reading this :3

i have problem with summon command
example:
i'm on xyz 1500 y 1500 and monsters are on lv 22-23 when we have zombie hp is ~ 62
but if i use command /summon zombie ~ ~ ~ {ForgeData:{LEVEL:34}} i try lvl 10,50.100.250,500) lvl
display works but hp and dmg is like base zombie lv1