[TYPO3-mvc] Add object fails

[Valeria Tabolsky]

Hi Gianluca,

yes,  I've tried  to debug and i see that Category is not empty, it's an object of the given type and  UID existing in database. 
The property is defined like this:

	/**
	 * @var vendor\PluginName\Domain\Model\LinkCategory
	 * @lazy
	 */
	protected $category;

I've tried without @lazy but seems it doesn't matter. 

Thank you for your help!