why does my instantiate sometimes dupe my prefab?

So im in the middle of making my 2D infinite runner using C# script and my SPIKE that is to destroy and Respawn my Player but it will sometimes duplicate my character 2-3 times if i land on the spike on an angle (both character and spike have box colliders but the spikes collider can be altered) i should also note Player is a prefab

If anyone has anything that could help me i would appreciate im an amateur hoping to improve

here is what i have so far

 public class SPIKE1 : MonoBehaviour {
 
     public GameObject Player;
     public Transform SpawnPoint;
     private bool respawn = false;
 
     void OnCollisionStay2D(Collision2D coll)
     {
         if (coll.gameObject.tag == "Player")
             Destroy(coll.gameObject);
 
         if (respawn)
             return;
     
         if (coll.gameObject.tag == "Player")
             Instantiate(Player, SpawnPoint.position, SpawnPoint.rotation);
         SendMessage("respawn");
     }