登録されていないタグはセットできるか?

SetTagTest_02.cs

	string tagName = "TagImport";

	void Start(){
		GameObject prefab = (GameObject) Resources.Load("Prefabs/TagTest/TagCube");
		Instantiate(prefab, Vector3.zero, Quaternion.identity);
		getByTagObj = GameObject.FindGameObjectWithTag(tagName);
		rb = getByTagObj.AddComponent<Rigidbody>();
		isRigidbodyAttached = true;
	}