Lua Error ACC

[bolero]

Fatal error: Uncaught exception 'E_OTS_NotLoaded' in C:\xampp\htdocs\pot\OTS_Account.php:769 Stack trace: #0 C:\xampp\htdocs\highscores.php(93): OTS_Account->getCustomField('flag') #1 C:\xampp\htdocs\index.php(117): include('C:\xampp\htdocs...') #2 {main} thrown in C:\xampp\htdocs\pot\OTS_Account.php on line 769

How I can repair this error?

 

[Cykotitan]

ALTER TABLE accounts ADD flag varchar(255) NOT NULL;