public function markAsUnread()
	{
		if (!$this->get('id'))
		{
			$this->addError('Recipient record not found');
			return false;
		}

		$xseen = Seen::oneByMessageAndUser($this->get('mid'), $this->get('uid'));

		if ($xseen->get('id'))
		{
			if (!$xseen->destroy())
			{
				$this->addError($xseen->getError());
				return false;
			}
		}

		return true;
	}