Syntax error (Opgelost)

$nr = "1";

$query5 = "UPDATE cms_aanbieding_vd_week SET product_id='".$_GET['id']."',update='".$nr."' WHERE id='".$nr."'"; 
mysql_query($query5) or die (mysql_error()); 

$nr = "1";
 
$query5 = "UPDATE cms_aanbieding_vd_week SET product_id='".$_GET['id']."',update='".$nr."' WHERE id='".$nr."'"; 
mysql_query($query5) or die (mysql_error());

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'update='1' WHERE id='1'' at line 1

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'update='1' WHERE id='1'' at line 1