问无法通过php更新mysql中的行

EN

 $id = $_GET['update'];
 $games = htmlentities($_POST['games']);
        $version = htmlentities($_POST['version']);
        $platform = htmlentities($_POST['platform']);
        $frequency = htmlentities($_POST['frequency']);
        $proposal = htmlentities($_POST['proposal']);
        $SQLstring2 = "UPDATE " .$TableName. " SET Game=?,Version=?,Platform=?,Frequency=?,Proposed solution=? WHERE BugID= " .$id;
        if ($stmt = mysqli_prepare($DBconnect, $SQLstring2)) {

            mysqli_stmt_bind_param($stmt,'sssss', $games, $version, $platform, $frequency, $proposal);
            $QueryResult2 = mysqli_stmt_execute($stmt);
            if ($QueryResult2 === FALSE) {
                echo "<p>Unable to execute the query.</p>"
                . "<p>Error code "
                . mysqli_errno($DBconnect)
                . ": "
                . mysqli_error($DBconnect)
                . "</p>";
            } else {
                echo "<h1> Thank you for your contribution";
            }
            mysqli_stmt_close($stmt);
        }



        mysqli_close($DBconnect);