SQL - PHP Multiple Set

im busy trying to set multiple fields in my DB and it is not working for some reason. Can you take a look and let me know where i have gone wrong? Thank you

<?php
error_reporting('E_ALL');
include 'db_header.php';

$id = $_GET['ID'];
$bronzeTokens = $_GET['bronzeTokens'];
$silverTokens = $_GET['silverTokens'];
$goldTokens = $_GET['goldTokens'];
$platinumTokens = $_GET['platinumTokens'];

$sql = "UPDATE Player SET bronzeTokens = $bronzeTokens, goldTokens = $goldTokens, silverTokens = $silverTokens, platinumTokens = $platinumTokens WHERE ID = $id";
$result = $conn->query($sql);
?>