Cannot set Selection.activeObject (no errors, no clues)

Questions & Answers
1

Hello, ive got a problem. Namely, i need to drag hundreds of prefabs into the scene, have them automatically assigned to an parent of my choice, then automatically select the parent, because i need to take a look quickly.
The prefabs have assigned a script;

using UnityEngine;
using System.Collections;
using UnityEditor;

    [ExecuteInEditMode]
    public class EditorAutoPlacement : MonoBehaviour {
    
		public bool selectParent = false;
        public string parentName;
        [HideInInspector]
        public bool alreadyPlaced = false;
    
        void Awake()
        {
            if (Application.isEditor && !alreadyPlaced)
            {
                transform.parent = GameObject.Find(parentName).transform;
                alreadyPlaced = true;
				if(selectParent)
				{
					SelectParent();
				}
            }
        }
		void SelectParent(){
			Selection.activeObject = gameObject.transform.parent;
		}
    }

The selection does not change to the prefab’s parent gameObject. I also tried Selection.activeGameObject = gameObject.transform.parent.gameObject and it did not work as intended.
Cheers

2

Selection.activeObject works only in Start() not Awake()