Vökuró: PDOException: SQLSTATE[22003]: Numeric value out of range

I installed Vökuró and its database. When I try to login with invalid credentials I get the following error:

[FATAL] Unhandled PDOException: SQLSTATE[22003]: Numeric value out of range: 1264 Out of range value adjusted for column 'attempted' at row 1
in F:\Projekte\phalcon\sample-apps\vokuro\app\library\Auth\Auth.php on line 87

 PDOStatement->execute()                              # line 87, file: ...\vokuro\app\library\Auth\Auth.php
 phalcon\db\adapter\Pdo->executePrepared()                       [php-phalcon]
 phalcon\db\adapter\Pdo->execute()                               [php-phalcon]
 phalcon\db\Adapter->insert()                                    [php-phalcon]
 phalcon\mvc\Model->_doLowInsert()                               [php-phalcon]
 phalcon\mvc\Model->save()                                       [php-phalcon]
 vokuro\auth\Auth->registerUserThrottling()           # line 87, file: ...\vokuro\app\library\Auth\Auth.php
 vokuro\auth\Auth->check()                            # line 29, file: ...\vokuro\app\library\Auth\Auth.php
 vokuro\controllers\SessionController->loginAction()  # line 90, file: ...\vokuro\app\controllers\SessionController.php
 phalcon\Dispatcher->dispatch()                                  [php-phalcon]
 phalcon\mvc\Application->handle()                               [php-phalcon]
 {main}                                               # line 36, file: ...\vokuro\public\index.php

Question 1: What am I doing wrong here?

I believe Phalcon trys to save a failed login attempt. The provided DDL looks as follows:

CREATE TABLE IF NOT EXISTS `failed_logins` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `usersId` int(10) unsigned DEFAULT NULL,
  `ipAddress` char(15) NOT NULL,
  `attempted` smallint(5) unsigned NOT NULL,
  PRIMARY KEY (`id`),
  KEY `usersId` (`usersId`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

However I can't figure out what Phalcon actually tries to execute, therefore

Question 2: Can I configure the PDO adapter to show the failed SQL statement if an error occurres? If so, how?

Thank's a lot.