RE: recently, in the createcustomer stage, i frequently recive "multiple requests were attempting to modify the same resource at once. retry the request."

[Google Ads API Forum Advisor]

Hi,

Thank you for contacting the Google Ads API support team.

In general, the CONCURRENT_MODIFICATION error occurs due to multiple processes that are trying to update the same entity at the same time. This also includes updating the entity in the Google Ads UI while updating via the API as well. As you are aware, waiting for about 30 seconds, then retrying the request will resolve the issue. To avoid issues, ensure only one operation occurs per entity at any given time. Consolidate repeated mutations on the same entity into a single request to reduce the frequency of updates.

If your code is correct and still this issue persists, it might be a temporary error caused by operational delays. Retrying the request should resolve it.

Thanks,
 

Google Ads API Team

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[2025-06-05 13:12:14Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01reLkl:ref" (ADR-00310259)

[Tim Chen]

Hi, Thank you for you response!

But in my case, I calling the CreateCustomer API, it response a error, error detail just like I submitted codes;
But! Though the API return the error, the new customer actual is created succeed!
It let me confuse, I can't confirm the customer is created or not, and if created, I can't get the new customer id.
And I can't retry CreateCustomer, because  it make me create repeated customer.

Looking forward to your reply.

[Tim Chen]

And in this case, I can't retry CreateCustomer, because  it make me create repeated customer.

[Google Ads API and AdWords API Forum]

Hi,

In order to investigate your issue further, kindly provide us with the updated complete API logs (request and response logs with request-id and request header) generated at your end while creating the customer via the Google Ads API.

If you are using a client library and haven't enabled the logging yet, I would request you to enable logging for the specific client library that you are using. You can refer to the guides .Net to enable logging at your end. For REST interface requests, you can enable logging via the curl command by using the -i flag.

You can send the details via Reply privately to the author option, or direct private reply to this email.

Thanks & Regards,

Google Ads API support team.

[Google Ads API Forum Advisor]

Hi,

Thank you for providing the additional information.

I would like to inform you that our team is currently investigating the root cause for the 'CONCURRENT_MODIFICATION' errors while working with the CustomerService.CreateCustomerClient method. As soon as we have an update, a member of our team will reach out to you promptly. In the meantime, your patience is greatly appreciated.

 

Thanks,
 

Google Ads API Team

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[2025-06-20 10:21:21Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01reLkl:ref" (ADR-00310259)