Enemy health mechanics when spawned using math random

Hi! In this game I’m working on I used math random to spawn enemies from a single template. Each enemy should be hit 5 times before they are destroyed. My problem is that I think they share one counter or life value. So for the first enemy I try to defeat, it work fine, five hits and its destroyed. But for the next few, one hit and they’ll be destroyed. I was wondering how I could fix this

Here are my two codes:

first (connected to the enemy entity):

var MushroomHealth = pc.createScript('mushroomHealth');

MushroomHealth.attributes.add('mushroomLife', {type: 'number', default: 5});

// initialize code called once per entity
MushroomHealth.prototype.initialize = function() {

    MushroomHealth.instance = this;
    this.gmushroomLife = this.mushroomLife;

second (connected to the attack entity):

var BulletCollision = pc.createScript('bulletCollision');

BulletCollision.attributes.add('mushroomEntity1', {type: "entity"})

// initialize code called once per entity
BulletCollision.prototype.initialize = function() {
    this.entity.collision.on('collisionstart', this.onCollisionStart, this);

// update code called every frame
BulletCollision.prototype.onCollisionStart = function(result) {

    if (result.other.name == "Mushroom1"){
        MushroomHealth.instance.gmushroomLife -=1;

        if(MushroomHealth.instance.gmushroomLife <=0){