public function getRelationFieldName() {
        if ($relationFieldId = $this->getRelationFieldId()) {
            $names = $this->getRespondentTrack()->getTrackEngine()->getFieldNames();
            $fieldPrefix = \Gems\Tracker\Model\FieldMaintenanceModel::FIELDS_NAME . \Gems\Tracker\Engine\FieldsDefinition::FIELD_KEY_SEPARATOR;
            $key = $fieldPrefix . $relationFieldId;

            return array_key_exists($key, $names) ? lcfirst($names[$key]) : null;
        }

        return null;
    }