private function registerGroupChange($custId, $groupIdOld, $groupIdNew)
    {
        $data = new EChangeGroup();
        $data->setCustomerRef($custId);
        $data->setGroupOld($groupIdOld);
        $data->setGroupNew($groupIdNew);
        $dateChanged = $this->hlpDate->getUtcNowForDb();
        $data->setDateChanged($dateChanged);
        $this->daoChangeGroup->create($data);
    }