StartCoroutine and IEnumerator calls a debug function too many times

Unity Engine
1

hi want to debug message only once, but it appers that the funciotn is called manny times instead of once
Could sombody kindly take a quick look at this simple script and point out whats the issue?

void Start () {
        animator = GetComponent<Animator> ();
        NPCagent = GetComponent < NavMeshAgent> ();


        StartCoroutine(Wait(7));


    }
   
    // Update is called once per frame
    void Update () {
        //waypoint_X=
        NPCagent.SetDestination (destination.position);
    }


IEnumerator Wait(float waitTime){
    yield return new WaitForSeconds(waitTime);
        Debug.Log (" this  massage  should appire  in  console  only once");
}
2

Oh dummy I. I had this script attached to 10 objects .LOL mistery issue solved, case closed