hi,
seems like your database is missing some fields .... always download the latest zip and hit install if u use aws hack (this will notify u if John updates it) to add that field run
Code:
ALTER TABLE warnings ADD COLUMN warned_status char(1);
if you use a "TABLE_PREFIX" you must add it before the tablename (warnings in this case) the cause of your problem is an out of date installation try to uploaded the latest files and see if that resolves your problem.(open install_warn.php there you can see the MySQL schemas)