Проблеммы с RedBeanPHP

$test = R::dispense('oc_product_to_category');
$test->product_id = 51;
$test->category_id = 60;
R::store($test);

При выполнении данного кода выдает ошибку:

Fatal error: Uncaught RedBeanPHP\RedException: Invalid type: oc_product_to_category in D:\xampp\htdocs\test\rb.php:12675
Stack trace:
#0 D:\xampp\htdocs\test\rb.php(10723): RedBeanPHP\Util\DispenseHelper::dispense(Object(RedBeanPHP\OODB), 'oc_product_to_c...', 1, false)
#1 D:\xampp\htdocs\test\index.php(10): RedBeanPHP\Facade::dispense('oc_product_to_c...')
#2 {main} thrown in D:\xampp\htdocs\test\rb.php on line 12675