[HELP ME]registerNamespaceAlias not to play a role

<?php
use Phalcon\Mvc\Model\Manager as ModelsManager;
...

$di->set(
    'modelsManager',
    function () {
        $modelsManager = new ModelsManager();
        $modelsManager->registerNamespaceAlias(
            'm',
            'Platform\Models\Entities\Order'
        );
        return $modelsManager;
    }
);

Model

<?php
namespace Platform\Models\Entities;

class Order extends \Phalcon\Mvc\Model
{
}

<?php
namespace Platform\Models\Entities;

class Business extends \Phalcon\Mvc\Model
{
}

Controller

<?php
$this->modelsManager->executeQuery('SELECT r.* FROM m:Order AS r JOIN m:Business AS b');

error

Syntax error, unexpected token ORDER, near to ' AS r JOIN m:Business AS b', when parsing: SELECT r.* FROM m:Order AS r JOIN m:Business AS b (49)