Instantiating for Item Generator Not Working?

Dear fellow unity3d users I have a problem with a Item generating script the problem is no item is being made here is my code:

using System.Collections;

public class CommonItemGenerator : MonoBehaviour {

 private int WeaponRarity;
 
 private int ConsumableRarity;
 
 private int AmmoRarity;
 
 private float ItemTimer;
 
 public bool HasItemGenerated = false;
 
 private Transform GeneratedItem;
 
 //Item Prefabs
 public GameObject Makarov;
 public GameObject CannedBeans;
 public GameObject CannedPasta;
 public GameObject TrailMix;
 public GameObject Cola;
 public GameObject EnergyDrink;
 public GameObject WaterBottle;
 
 private void Update(){
     WeaponRarity = Random.Range(1,11);
     ConsumableRarity = Random.Range(1,3);
     AmmoRarity = Random.Range(1,5);
     if(HasItemGenerated = false){
         GenerateItem();
     }
 }
 
 private void GenerateItem(){
     if(WeaponRarity == 1){
         if(!HasItemGenerated){
             HasItemGenerated = true;
             GameObject GenItem = Instantiate(Makarov, Vector3.zero, Quaternion.identity) as GameObject;
             GenItem.transform.parent = gameObject.transform;
             GenItem.transform.localPosition = Vector3.zero;
         }
     }
     else if(ConsumableRarity == 1){
         if(!HasItemGenerated){
             HasItemGenerated = true;
             GameObject GenItem = Instantiate(CannedBeans, Vector3.zero, Quaternion.identity) as GameObject;
             GenItem.transform.parent = gameObject.transform;
             GenItem.transform.localPosition = Vector3.zero;
         }
     }
     else if(AmmoRarity == 1){
         if(!HasItemGenerated){
             GameObject GenItem = Instantiate(Cola, Vector3.zero, Quaternion.identity) as GameObject;
             GenItem.transform.parent = gameObject.transform;
             GenItem.transform.localPosition = Vector3.zero;
         }
     }
     else{
         if(!HasItemGenerated){
             HasItemGenerated = true;
             GameObject GenItem = Instantiate(WaterBottle, Vector3.zero, Quaternion.identity) as GameObject;
             GenItem.transform.parent = gameObject.transform;
             GenItem.transform.localPosition = Vector3.zero;
         }
     }
 }
 

}