Unity index out of Rangeの解決

Question

実現したいこと

IndexOutOfRangeException: Index was outside the bounds of the array.
Sample.Start () の解決をしたい

前提

特定のタグの中から2つを選んで別タグにしようとしたときにIndexOutOfRangeException: Index was outside the bounds of the array.
Sample.Start () が出た。

発生している問題・エラーメッセージ

IndexOutOfRangeException: Index was outside the bounds of the array.
Sample.Start () (at Assets/Sample.cs:38)

該当のソースコード

using Photon.Pun;
using UnityEngine;
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class Sample : MonoBehaviourPunCallbacks
{
    public GameObject camera;
    public int desiredNumberCount = 2;
    public string oldTag;
    public string newTag;

    private void Start()
    {
        PhotonNetwork.IsMessageQueueRunning = true;

        PhotonNetwork.NickName = "Player";
        PhotonNetwork.ConnectUsingSettings();
        var position = new Vector3(UnityEngine.Random.Range(-3f, 3f), UnityEngine.Random.Range(-3f, 3f));
        GameObject avatar = PhotonNetwork.Instantiate("Avatar", position, Quaternion.identity);


        int num = PhotonNetwork.CurrentRoom.PlayerCount;
        camera.transform.parent = avatar.transform;

        if (PhotonNetwork.IsMasterClient)
        {
            PhotonNetwork.CurrentRoom.SetStartTime(PhotonNetwork.ServerTimestamp);
        }

        GameObject[] objects = GameObject.FindGameObjectsWithTag(oldTag);
        int[] uniqueRandomNumbers = Enumerable.Range(0, objects.Length).OrderBy(x => Guid.NewGuid()).Take(desiredNumberCount).ToArray();

        for (int i = 0; i < desiredNumberCount; i++)
        {
            objects[uniqueRandomNumbers[i]].tag = newTag;
        }
    }
}