Erro ao criar char no Xampp

Galera depois que fiz meu char GOD no meu dbo não consigo criar outros char da esse erro: 

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '0' for key 'PRIMARY'' in C:\xampp\htdocs\system\application\libraries\POT\OTS_Player.php:188 Stack trace: #0 C:\xampp\htdocs\system\application\libraries\POT\OTS_Player.php(188): PDO->query('INSERT INTO `pl...') #1 C:\xampp\htdocs\system\application\controllers\character.php(180): OTS_Player->save() #2 [internal function]: Character->create_character() #3 C:\xampp\htdocs\system\codeigniter\CodeIgniter.php(236): call_user_func_array(Array, Array) #4 C:\xampp\htdocs\index.php(165): require_once('C:\xampp\htdocs...') #5 {main} thrown in C:\xampp\htdocs\system\application\libraries\POT\OTS_Player.php on line 188

POR FAVOR ME AJUDEM !!