Enemy Damage

It has been 7 days, that I am trying to solve this problem, But I can not figure it out. Please help me.

I have an enemyHealth script something like this:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class EnemyHealth : MonoBehaviour
 {
     public float maxHealth = 100f;
     public float currentHealth;
 
     public bool isDead = false;
     Animator enemyAnim;
     private void OnEnable()
     {
         currentHealth = maxHealth;
         enemyAnim = GameObject.FindGameObjectWithTag("Enemy").GetComponentInChildren<Animator>();
     }
 
     public void TakeDamage(float damageAmount)
     {
         currentHealth -= damageAmount;
         if(currentHealth <= 0)
         {
             Die();
         }
     }
 
     public void Die()
     {
         enemyAnim.SetTrigger("isDeadTrigger");
         isDead = true;
     }
 }
 

and then I have a playerGun script, where i shoot the enemies. it is something like this:

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class PlayerGun : MonoBehaviour
 {
     int id;
     [SerializeField]
     int currAmmo;
     float reloadSpeed = 3;
     public AudioSource source;
     public AudioClip gunSound;
     public AudioClip reloadSound;
     float impactForce = 30f;
     public float fireRate = 0.1f;
     public GameObject enemyCarrate;
 
     public int coins;
     public Text coinsText;
 
     GameObject gameController;
     WeaponDatabase database;
 
     Animator animator;
     Animator enemyAnim;
 
     EnemyHealth enemyStat;
 
     public ParticleSystem muzzleFlash;
     public GameObject impactEffect;
 
     bool reloading = false;
 
     private float timer;
 
     private void Awake()
     {
         source = GetComponent<AudioSource>();
     }
 
     private void Start()
     {
         gameController = GameObject.FindGameObjectWithTag("GameController");
         database = gameController.GetComponent<WeaponDatabase>();
         id = GameObject.FindGameObjectWithTag("Weapon").GetComponent<ItemID>().itemID;
         currAmmo = database.weapons[id].maxAmmo;
         animator = GameObject.FindGameObjectWithTag("Player").GetComponentInChildren<Animator>();
         enemyAnim = GameObject.FindGameObjectWithTag("Enemy").GetComponentInChildren<Animator>();
         coins = 0;
     }
 
     private void Update()
     {
         if (Input.GetKey(KeyCode.R) && !reloading)
         {
             if (currAmmo == database.weapons[id].maxAmmo)
             {
                 return;
             }
             else
             {
                 
                 StartCoroutine(Reload());
                 //stop firing while reloading
                 return;
             }
         }
         if(currAmmo<=0)
         {
             StartCoroutine(Reload());
             //stop firing while reloading
             return;
         }
         timer += Time.deltaTime;
         if (timer >= fireRate)
         {
             if (Input.GetButton("Fire1"))
             {
                 timer = 0;
                 Fire();
             }
         }
         /*
         if (Input.GetButton("Fire1") && Time.time >= nextTimeToFire)
         {
             Fire(); 
         }
         */
     }
 
     IEnumerator Reload()
     {
         reloading = true;
         source.PlayOneShot(reloadSound, 0.3f);
         animator.SetBool("reloading", true);
         yield return new WaitForSeconds(reloadSpeed);
         currAmmo = database.weapons[id].maxAmmo;
         reloading = false;
         animator.SetBool("reloading", false);
     }
 
     void Fire()
     {
         muzzleFlash.Play();
         source.PlayOneShot(gunSound, 0.3f);
         currAmmo--;
         animator.SetInteger("condition", 6);
        
         RaycastHit hit;
         
         if (Physics.Raycast(transform.position, Camera.main.transform.forward, out hit, database.weapons[id].range))
         {
             enemyStat = hit.transform.GetComponent<EnemyHealth>();
             if (hit.transform.tag == "Enemy")
             {
                 if (!enemyStat.isDead)
                 {
                     enemyStat.TakeDamage(database.weapons[id].damage);
 
                     if (enemyStat.currentHealth <= 0)
                     {
 
                         enemyStat.isDead = true;
                         //Instantiate(enemyCarrate, enemyStat.transform.position, enemyStat.transform.rotation);
                         coins = coins + 10;
                         coinsText.text = coins.ToString();
                         // enemyAnim.SetTrigger("isDeadTrigger");
                         enemyStat.Die();
                     }
                 }
             }
 
             if (hit.rigidbody != null)
             {
                 hit.rigidbody.AddForce(-hit.normal * impactForce);
             }
             GameObject impactGO = Instantiate(impactEffect, hit.point, Quaternion.LookRotation(hit.normal));
             Destroy(impactGO, 1f);
             
         }
     }
 
 
 }
 

the enemyHealth script is attached to the enemy prefab and the playerGun script is attached to the palyer prefab.

When I have only one enemy in the scene. it works fine and it kills the enemy and i get some coins. but I bring more types of the enemy prefabs, still works only for one. at the same time the health of all enemies reduces when i shoot at one.

Please help me to find the error. I really don't know what to do.