google-ads-python: Unable to create sitelinks for ad group in bulk (batch job)

UPDATE: Partially solved. Please see following comment.

Hi! Is that possible to create sitelinks and assign them into ad group in the same Batch Job?

I have a method that creates a sitelink extension like this:

    def _get_extension_feed_item_resource_name(self, feed_item_id: str) -> str:
        """
        Returns resource_name for Extension Feed Item by ID

        :param feed_item_id: Feed item ID
        :return: Feed item resource name
        """
        extension_feed_item_service = self.client.get_service(
            "ExtensionFeedItemService", version=GOOGLE_ADS_API_VERSION
        )
        return extension_feed_item_service.extension_feed_item_path(self.customer_id, feed_item_id)

    def _build_ad_group_sitelink_extension_operation(
        self, ad_group_resource_name: str, link_text: str, final_url: str
    ) -> ExtensionFeedItemOperation:
        """
        Helper method that creates sitelink extension feed item for ad group.

        :param ad_group_resource_name: Ad Group resource name
        :param link_text: Link text
        :param final_url: Target URL
        :return: ExtensionFeedItemOperation
        """
        extension_type_enum = self.client.get_type("ExtensionTypeEnum")
        extension_feed_item_operation = self.client.get_type(
            "ExtensionFeedItemOperation", version=GOOGLE_ADS_API_VERSION
        )
        extension_feed_item = extension_feed_item_operation.create
        extension_feed_item.extension_type = extension_type_enum.SITELINK
        extension_feed_item.sitelink_feed_item.link_text = link_text
        extension_feed_item.targeted_ad_group = ad_group_resource_name
        extension_feed_item.sitelink_feed_item.final_urls.append(final_url)
        # Creates a resource name using the temporary ID.
        feed_item_id = str(self._get_next_temporary_id())
        extension_feed_item.resource_name = self._get_extension_feed_item_resource_name(feed_item_id)

        return extension_feed_item_operation

So I’m creating few sitelinks using _build_ad_group_sitelink_extension_operation method and then I’m trying to assign them into ad group using

# looping through link items ...
extension_feed_item_operation = self._build_ad_group_sitelink_extension_operation(
                    ad_group_resource_name=ad_group_resource_name,
                    link_text=item["text"],
                    final_url=item["url"],
                )
link_resource_id = extension_feed_item_operation.create.resource_name
# memorizing link_resource_id for AdGroupExtensionSettingOperation

Feed item resource names looks the following:

Out[19]:
['customers/<hidden>/extensionFeedItems/-10',
 'customers/<hidden>/extensionFeedItems/-18',
 'customers/<hidden>/extensionFeedItems/-26',
 'customers/<hidden>/extensionFeedItems/-34']

and then I’m creating AdGroupExtensionSettingOperation

    def _build_ad_group_extension_settings_operation(
        self, ad_group_resource_name: str, feed_item_resource_names: List[str]
    ) -> AdGroupExtensionSettingOperation:
        """
        Builds Ad Group extension setting operation
        :param ad_group_resource_name: Ad Group resource name
        :return: AdGroupExtensionSettingOperation
        """
        ad_group_ext_setting_operation = self.client.get_type(
            "AdGroupExtensionSettingOperation", version=GOOGLE_ADS_API_VERSION
        )
        extension_type_enum = self.client.get_type("ExtensionTypeEnum", version=GOOGLE_ADS_API_VERSION)

        ad_group_ext_setting = ad_group_ext_setting_operation.create
        ad_group_ext_setting.ad_group = ad_group_resource_name
        ad_group_ext_setting.extension_type = extension_type_enum.SITELINK
        ad_group_ext_setting.extension_feed_items.extend(feed_item_resource_names)
        return ad_group_ext_setting_operation

finally I’m appending my ExtensionFeedItemOperations and AdGroupExtensionSettingOperation to a batch job;

In [35]: data['operations']['ad_group_links']
Out[35]:
[extension_feed_item_operation {
   create {
     resource_name: "customers/<hidden>/extensionFeedItems/-10"
     sitelink_feed_item {
       link_text: "Buty zimowe"
       final_urls: "https://domaincom/pl/buty-zimowe-damskie/2a/"
     }
     extension_type: SITELINK
     targeted_ad_group: "customers/<hidden>/adGroups/-3"
   }
 },
 ad_group_extension_setting_operation {
   create {
     extension_type: SITELINK
     ad_group: "customers/<hidden>/adGroups/-3"
     extension_feed_items: "customers/<hidden>/extensionFeedItems/-10"
   }
 },
 extension_feed_item_operation {
   create {
     resource_name: "customers/<hidden>/extensionFeedItems/-18"
     sitelink_feed_item {
       link_text: "Buty zimowe"
       final_urls: "https://domaincom/pl/buty-zimowe-damskie/2a__zapiecie-buta-zamek/"
     }
     extension_type: SITELINK
     targeted_ad_group: "customers/<hidden>/adGroups/-11"
   }
 },
 ad_group_extension_setting_operation {
   create {
     extension_type: SITELINK
     ad_group: "customers/<hidden>/adGroups/-11"
     extension_feed_items: "customers/<hidden>/extensionFeedItems/-18"
   }
 },
 extension_feed_item_operation {
   create {
     resource_name: "customers/<hidden>/extensionFeedItems/-26"
     sitelink_feed_item {
       link_text: "Kozaki damskie"
       final_urls: "https://domaincom/pl/kozaki-damskie/2a/"
     }
     extension_type: SITELINK
     targeted_ad_group: "customers/<hidden>/adGroups/-19"
   }
 },
 ad_group_extension_setting_operation {
   create {
     extension_type: SITELINK
     ad_group: "customers/<hidden>/adGroups/-19"
     extension_feed_items: "customers/<hidden>/extensionFeedItems/-26"
   }
 },
 extension_feed_item_operation {
   create {
     resource_name: "customers/<hidden>/extensionFeedItems/-34"
     sitelink_feed_item {
       link_text: "Kozaki damskie"
       final_urls: "https://domaincom/pl/kozaki-damskie/2a__zapiecie-buta-zamek/"
     }
     extension_type: SITELINK
     targeted_ad_group: "customers/<hidden>/adGroups/-27"
   }
 },
 ad_group_extension_setting_operation {
   create {
     extension_type: SITELINK
     ad_group: "customers/<hidden>/adGroups/-27"
     extension_feed_items: "customers/<hidden>/extensionFeedItems/-34"
   }
 }]

The response from batch job contains the following error:

Batch job #50 has a status "Field 'resource_name' cannot be modified by 'CREATE' operation., at mutate_operations[50].extension_feed_item_operation.create.resource_name" and response type "N/A"
Batch job #51 has a status "Multiple errors in ‘details’. First error: Field must be set., at mutate_operations[51].ad_group_extension_setting_operation" and response type "N/A"

So it looks like I cannot use temporary IDs for feed items? What should I do differently to create feed items and assign into ad group in a single Batch Job then?