Query problem

[Xplorer4x4]

So as intructed here https://vborg.vbsupport.ru/showpost....&postcount=123 , I changed the plug in from

PHP Code:

$db->query_write("ALTER TABLE " . TABLE_PREFIX . "user ADD (isstaffrank INT(6) UNSIGNED NOT NULL DEFAULT '')"); 


to

PHP Code:

$db->query_write("ALTER TABLE " . TABLE_PREFIX . "user ADD (isstaffrank INT(6) UNSIGNED NOT NULL)"); 


Now I get a datbase error every time I attempt to install product. I forgot to make a database back up before hand, so does anyone have any suggestions on fixxing the results of the second query?