Problem instantiating

hi, i try to instantiate a prefab, using clone then, adding component to this clone with addcomponent , inside this component theres some variable, 1 for hp points. but i get always the same F"·%$ error " You are trying to create a MonoBehaviour using the 'new' keyword. This is not allowed. MonoBehaviours can only be added using AddComponent(). Alternatively, your script can inherit from ScriptableObject or no base class at all " So...why ?

this is inside de hpObjects script :

  public int vida = 100;
     
     private void Update()
     {
         if (vida<=0)
         {
             Destroy(gameObject, 0.2f);
             
         }
     }

and this for the instantiate manager :

 void Update()
     { spawnPosition = p1.gameObject.transform.position * Random.Range(1, 5);
         enemigoEnEscena = GameObject.FindGameObjectWithTag("enemy");
 
 
         if (enemigoEnEscena == null)
         {
             prefab.GetComponent<VidaObjetos>();
 
             clon = Instantiate(prefab, spawnPosition, Quaternion.identity);
             clon.AddComponent<VidaObjetos>();
         }
     }

Thanks