Mysqli prepare 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 iConomy SET Balance = Balance + 10000 WHERE username = ( SELECT' at line 2

    Zend_Db_Statement_Mysqli->_prepare() in Zend/Db/Statement.php at line 115
    Zend_Db_Statement->__construct() in Zend/Db/Adapter/Mysqli.php at line 381
    Zend_Db_Adapter_Mysqli->prepare() in Zend/Db/Adapter/Abstract.php at line 478
    Zend_Db_Adapter_Abstract->query() in ExtendUserUpgrade/UserUpgradeModel.php at line 22
    ExtendUserUpgrade_UserUpgradeModel->upgradeUser() in XenForo/ControllerAdmin/UserUpgrade.php at line 253
    XenForo_ControllerAdmin_UserUpgrade->actionManual() in XenForo/FrontController.php at line 310
    XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
    XenForo_FrontController->run() in /home/shadoom/xenforo/admin.php at line 13