Issue with Assigning Items to Existing Campaign in eBay bulkCreateAdsByListingId

[ozeparts-com-au]

I have been using the bulkCreateAdsByListingId function for some time without any issues. However, recently I encountered a problem when trying to assign items to an existing campaign.

Here are the details:

• The campaign is active and currently has one item listed.
• When I attempt to add another item to this existing campaign, I receive the following error:
  
  

Array
(
    [responses] => Array
        (
            [0] => Array
                (
                    [statusCode] => 400
                    [listingId] => ********3335
                    [errors] => Array
                        (
                            [0] => Array
                                (
                                    [errorId] => 35036
                                    [domain] => API_MARKETING
                                    [category] => REQUEST
                                    [message] => An ad for listing Id ********3335 already exists.
                                    [parameters] => Array
                                        (
                                            [0] => Array
                                                (
                                                    [name] => listingId
                                                    [value] => ********3335
                                                )
                                        )
                                )
                        )
                )
        )
)
​

According to the error message, an ad for listing ID ********3335 already exists. However, this item ID is no longer listed in the current campaign, yet the error persists.

Please see the screenshot below of our existing campaign, which currently has only one item ID listed.

Could you please assist in resolving this issue? Your prompt response would be greatly appreciated.

Thank you.