In control – a mod that allows you to arbitrarily change the various parameters of mobs in minecraft, customizable a huge number of parameters, from the amount of health, to the time and place of appearance, in what biomes, at what lighting, with what weapons.
Personally, I just need to reduce the spawn mobs, or rather the chance of spawn, something like this.

I need the code to simply reduce the chance of spawning certain mobs from the mod.

I tried to write the code myself with the help of guides, but it doesn’t work, it writes this error
enter image description here

Code:

[
 “mob”: “Enmu”,
    “weight”: 5,
    “mingroupcount”: 1,    
    “maxgroupcount”: 1
},
[
 “mob”: “Zombie”,
    “weight”: 0,
    “mingroupcount”: 0,    
    “maxgroupcount”: 0
},

If anything the code is in a json called potentialspawn