Racing Game Leaderboard with Photon

Hallo I am trying to programm an online multiplayer racing game this is the code for my leaderboard. The general problem seems to be that the OnPhotonSerializeView changes the value temporary. A debug.log statement insede the method returns the correct values but in the update loop the same index of the array seems to have no value or 0. I also triedd to sync it with RPC calls but the problem is that if you pass in the trackvalue as a parameter every client is using his own trackvalue and not the one which was passsed in by an other client. I used a RPC method like this RPC("synctrackvalue", PhotonTargets.AllViaServer, myActornumber, mytrackvalue). The Method just sets the value myTrackvalue on the index myActornumber-1 in the array idOnTrackvalue.

So does someone know a solution for my problem? Or an other way to solve this? I am appreciating your help and I am extremely sorry for my bad englisch.

     private double time = 0;
     private float trackvalue = 0;
     private Transform LastCheckpoint;
     public Text Position1;
     public PhotonView photonView;
     private string[] idOnNickame = new string[4];
     private float[] idOnTrackvalue = new float[4];
 
 
     private void Awake()
     {
         PhotonNetwork.LocalPlayer.NickName = PhotonNetwork.LocalPlayer.ActorNumber.ToString() + "Player";
         string myNickname = PhotonNetwork.LocalPlayer.NickName;
         int myID = PhotonNetwork.LocalPlayer.ActorNumber;
         photonView.RPC("SyncNickname", RpcTarget.All, myID, myNickname);
     }
 
     private void Update()
     {
         CurrentLapTime = LapTimerTimestamp > 0 ? Time.time - LapTimerTimestamp : 0;
 
         //Set curent laptime
         UILapTimer.text = $"Laptime: {(int)CurrentLapTime / 60}:{(CurrentLapTime) % 60:00.000}";
 
         if (Time.time > time + 1)
         {
             if (LastCheckpoint != null)
             {
                 //value increses with the players progress
                 //indikator for position
                 trackvalue = CurrentLap * 4000 + lastCheckpointPassed * 400 + (transform.position - 
                 LastCheckpoint.position).magnitude;
                 //OnPhotonSerializeView should just put all other players values into the array so we need 
                  //to add ours ourself
                 int myID = PhotonNetwork.LocalPlayer.ActorNumber;
                 idOnTrackvalue[myID - 1] = trackvalue;
                 //new array to sort the trackvalues
                 float[] compareTrackvalues = idOnTrackvalue;
                 Array.Sort(compareTrackvalues);
                 //reserve so the greatest value is the first in the array
                 Array.Reverse(compareTrackvalues);
                 StringBuilder leaderboard = new StringBuilder();
                 for (int i = 0; i < compareTrackvalues.Length; i++)
                 {
                     //idOnNickname connects the online actor number (actor number-1 = index) with his 
                     //Nickname (value in the array)
                     //idOntrackvalue connects  the online actor number (actor number-1 = index) with his 
                      //trackvalue (value in the array)
                     //compareTrackavlues at this point should list all trackvalues sorted by progress so the 
                      //compareTrackvalues[0] is the
                     //of the raceleader
                     //then we get the value and search which index it got in the idOnTrackvalue
                     //with the index we got the actor number and with the actor number the index of the 
                     //string array with the player names
                     leaderboard.Append(idOnNickame[Array.IndexOf(idOnTrackvalue,compareTrackvalues[i])] + "\n");
                 }
                 Position1.text = leaderboard.ToString();
             }
             time = Time.time;
         }
     }
 
     public void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
     {
         if(stream.IsWriting)
         {
             stream.SendNext(PhotonNetwork.LocalPlayer.ActorNumber);
             stream.SendNext(trackvalue);
         }
         else if (stream.IsReading)
         {
             idOnTrackvalue[(int)stream.ReceiveNext()-1] = (float)stream.ReceiveNext();
             Debug.Log(idOnTrackvalue[0]);
             //A Debug.Log(idonTrackvalue[whatever actor number is in here]) statement would show the
             //right value of the other online players. So at this point it connects the
             //actornumber of the player (actornumber of the online player -1 = index in the 
              //arrayidOnTrackvalue)
             //and the value of the index is the onlineplayers trackvalue:
         }
     }
 
     [PunRPC]
     private void SyncNickname(int playerID, string playerNickname)
     {
         //this part works perfectly fine
         idOnNickame[playerID - 1] = playerNickname;
     }