[fw-db] Zend_Db_Table Issue

Hello,

I don't know if it is the right to ask however i have one issue that
nobody else managed to solve it.

I'm using zend framework 1.11.3, PHP 5.3 and MySQL 5.1 configured with
InnoDB engine. I'm trying to make a relationship between two tables
to apply cascade deletion but deletes only parental row and return me

Notice: Undefined index: numero_atual in
C:\htdocs\Advocacia\library\Zend\Db\Table\Abstract.php on line 1197

It happens when i try to delete one row from the model
Application_Model_ProcessosJudicial , I really can't see anything wrong
in the code or...

I would be thankful if anyone check it for me

class Application_Model_ProcessosJudicial extends Zend_Db_table {

protected $_name = "processos_judicial";
protected $_dependentTables = array('Application_Model_Partes',
'Application_Model_Andamentos');

protected $_referenceMap = array(
'Andamento' => array(
'columns' => array('numero_atual'),
'refColumns' => array('numero_atual'),
'refTableClass' => 'Application_Model_Andamentos',
'onDelete' => self::CASCADE,
'onUpdate' => self::RESTRICT
)
);

}

class Application_Model_Andamentos extends Zend_Db_table {

protected $_name = "processos_andamentos_judicial";

protected $_referenceMap = array(
'Andamento' => array(
'refTableClass' => 'Application_Model_ProcessosJudicial',
'refColumns' => array('numero_atual'),
'columns' => array('numero_atual'),
'onDelete' => self::CASCADE,
'onUpdate' => self::RESTRICT
)
);

}

My table structure

CREATE TABLE IF NOT EXISTS `processos_andamentos_judicial` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`numero_atual` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`data` datetime DEFAULT NULL,
`andamento` varchar(60) CHARACTER SET latin1 DEFAULT NULL,
`complemento` varchar(60) CHARACTER SET latin1 DEFAULT NULL,
`observacao` longtext CHARACTER SET latin1,
`tipo_processo` varchar(45) CHARACTER SET latin1 DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `numero` (`numero_atual`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=12 ;

CREATE TABLE IF NOT EXISTS `processos_judicial` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`numero_atual` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`numero_antigo` varchar(30) CHARACTER SET latin1 DEFAULT '',
`data_distribuicao` date DEFAULT NULL,
`orgao` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`circunscricao` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`local` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`feito` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`rito` varchar(45) CHARACTER SET latin1 DEFAULT NULL,
`fase` varchar(45) CHARACTER SET latin1 DEFAULT NULL,
`encerrado` tinyint(1) DEFAULT NULL,
`encerrado_data` date DEFAULT NULL,
`encerrado_motivo` varchar(45) CHARACTER SET latin1 DEFAULT NULL,
`suspenso` tinyint(1) DEFAULT NULL,
`suspenso_data` date DEFAULT NULL,
`valor_causa` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`assistencia_gratuita` tinyint(1) DEFAULT NULL,
`percentual` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`resumo` varchar(30) CHARACTER SET latin1 DEFAULT NULL,
`ultima_modificao` datetime DEFAULT NULL,
`criacao` datetime DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `numero_atual` (`numero_atual`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=43 ;