protected function _isAvailableInOtherOrder($oUser)
    {
        $oSeries = $this->getSerie();
        if (!$oSeries->oxvoucherseries__oxallowuseanother->value) {
            $oDb = \OxidEsales\Eshop\Core\DatabaseProvider::getDb();
            $sSelect = 'select count(*) from ' . $this->getViewName() . ' where oxuserid = ' . $oDb->quote($oUser->oxuser__oxid->value) . ' and ';
            $sSelect .= 'oxvoucherserieid = ' . $oDb->quote($this->oxvouchers__oxvoucherserieid->value) . ' and ';
            $sSelect .= '((oxorderid is not NULL and oxorderid != "") or (oxdateused is not NULL and oxdateused != 0)) ';

            if ($oDb->getOne($sSelect)) {
                $oEx = oxNew(\OxidEsales\Eshop\Core\Exception\VoucherException::class);
                $oEx->setMessage('ERROR_MESSAGE_VOUCHER_NOTALLOWEDSAMESERIES');
                $oEx->setVoucherNr($this->oxvouchers__oxvouchernr->value);
                throw $oEx;
            }
        }

        return true;
    }