Storing records

Two classes

class Status extends \Phalcon\Mvc\Model {
    public $id;
    public $title;

    public function initialize()
    {
        $this->hasMany( "id", "Tickets", "status_id");
    }
}

class Tickets extends \Phalcon\Mvc\Model    {
    public $id;
    public $status_id;

    public function initialize()
    {
        $this->belongsTo('status_id', 'Status', 'id', 
            array('alias' => 'Status', 'foreignKey' => true));
    }
}

But when I do

$tick = new Tickets();
$status = new Status();
$tick->status = $status;
$tick->save();

I receive an error Recoverable fatal error: Object of class Status could not be converted to string in Before save I can receive echo $tick->status->title; all works fine at this step.

CREATE TABLE `status` (
`id` int(11) NOT NULL,
`title` varchar(20) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `tickets` (
`id` int(11) NOT NULL,
`title` varchar(100) NOT NULL,
`text` text NOT NULL,
`createdon` datetime DEFAULT NULL,
`closedon` datetime DEFAULT NULL,
`editedon` datetime DEFAULT NULL,
`status_id` int(11) DEFAULT NULL,
`user_id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

ALTER TABLE `status`
    ADD PRIMARY KEY (`id`),
    ADD KEY `id` (`id`);

ALTER TABLE `tickets`
    ADD PRIMARY KEY (`id`),
    ADD KEY `status_id` (`status_id`),
    ADD KEY `user_id` (`user_id`);

ALTER TABLE `tickets`
    ADD CONSTRAINT `tickets_ibfk_1` FOREIGN KEY (`status_id`) REFERENCES `status` (`id`),
    ADD CONSTRAINT `tickets_ibfk_2` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`);
COMMIT;

Mysql 5.6.35 + PHP-FPM 7.1 + NGINX 1.10.1 + Phalcon 3.2.0

And when I retrive records all works,

$tick = findFirstById(17);
echo $tick->getStatus()->getTitle(); 

or

echo $tick->status->title;