protected function _checkUnique(\Magento\Framework\Model\AbstractModel $object)
    {
        $select = $this->getConnection()->select()->from(
            $this->getMainTable(),
            [$this->getIdFieldName()]
        )->where(
            'scope = :scope'
        )->where(
            'scope_code = :scope_code'
        )->where(
            'path = :path'
        );
        $bind = [
            'scope'    => $object->getScope(),
            'scope_code' => $object->getScopeCode(),
            'path'     => $object->getPath(),
        ];

        $configId = $this->getConnection()->fetchOne($select, $bind);
        if ($configId) {
            $object->setId($configId);
        }

        return $this;
    }