how do I keep each cloned object at a certain point after trigger

Hi, I'm recreating a knife throwing game like knife hit and what I have encountered is when I press a key to instantiate my knife object :

-the first knife when it hits the log collider is perfect as it will stop and rotate with the log -when I start to instantiate the next knife object(s) my original knife will move off and will start rotating as will the other ones I duplicate

here is my log script :

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class LogScript : MonoBehaviour {

 public float rotateSpeed = 3f;

 public GameObject knifePrefab;

 
 void FixedUpdate () {
     RotateLog();
 }

 void RotateLog()
 {
     transform.Rotate(0,0, rotateSpeed);
 }

 private void OnTriggerEnter2D(Collider2D target)
 {
     if (target.tag == "Player")
     {
         target.GetComponent<Rigidbody2D>().velocity = new Vector2(0,0);

         target.transform.parent = this.transform;

         Instantiate(knifePrefab, new Vector2(0, -3.5f), Quaternion.identity);
     }  

 }
 

}// end class

thanks in advance. Eric