PHP，MySQL 错误：列计数与第 1 行的值计数不匹配

我得到了这个错误:

Column count doesn't match value count at row 1

从以下代码:

$name = $_GET['name'];
$description = $_GET['description'];
$shortDescription = $_GET['shortDescription'];
$ingredients = $_GET['ingredients'];
$method = $_GET['method'];
//$image = $_GET['image'];
$username = $_GET['username'];
$length = $_GET['length'];
$dateAdded = uk_date();
$conn = mysql_connect('localhost', 'dbname', 'pass');
mysql_select_db('dbname');
$query = sprintf("INSERT INTO dbname (id, Name, Description, shortDescription, Ingredients, Method, Length, dateAdded, Username) VALUES ('', '%s', '%s', '%s', '%s', '%s', '%s', '%s')",
    mysql_real_escape_string($name),
    mysql_real_escape_string($description),
    mysql_real_escape_string($shortDescription),
    mysql_real_escape_string($ingredients),
    //mysql_real_escape_string($image),
    mysql_real_escape_string($length),
    mysql_real_escape_string($dateAdded),
    mysql_real_escape_string($username));

    $result = mysql_query($query) or die(mysql_error());

这个错误意味着什么？