Multiple requests were attempting to modify the same resource at once. Retry the request.

[xiaochuan li]

-------
Method: /google.ads.googleads.v18.services.ConversionGoalCampaignConfigService/MutateConversionGoalCampaignConfigs
Host: googleads.googleapis.com
Headers: {
  "developer-token": "REDACTED",
  "login-customer-id": "111111111",
  "x-goog-api-client": "gl-python/3.10.4 grpc/1.68.1 gax/2.24.0 gccl/25.1.0 pb/5.29.2",
  "x-goog-request-params": "customer_id=1111111111"
}
Request: customer_id: " 1111111111  "
operations {
  update {
    resource_name: "customers/ 1111111111  /conversionGoalCampaignConfigs/ 1111111111  "
    custom_conversion_goal: "customers/ 1111111111  /customConversionGoals/ 1111111111  "
  }
  update_mask {
    paths: "resource_name"
    paths: "custom_conversion_goal"
  }
}


Response
-------
Headers: {
  "google.ads.googleads.v18.errors.googleadsfailure-bin": "\n`\n\u0003\u0004\u0002\u0012YMultiple requests were attempting to modify the same resource at once. Retry the request.\u0012\u00169DjGbhbtifFsoevGxFf29g",
  "grpc-status-details-bin": "\b\u0003\u0012%Request contains an invalid argument.\u001a\u0001\nDtype.googleapis.com/google.ads.googleads.v18.errors.GoogleAdsFailure\u0012z\n`\n\u0003\u0004\u0002\u0012YMultiple requests were attempting to modify the same resource at once. Retry the request.\u0012\u00169DjGbhbtifFsoevGxFf29g",
  "request-id": "9DjGbhbtifFsoevGxFf29g"
}
Fault: errors {
  error_code {
    database_error: CONCURRENT_MODIFICATION
  }
  message: "Multiple requests were attempting to modify the same resource at once. Retry the request."
}
request_id: "9DjGbhbtifFsoevGxFf29g"

When I set up Goal for a large number of campaigns, this error occasionally occurs. Why?

[Google Ads API Forum Advisor]

Hi,

Thank you for reaching out to the Google Ads API support team.

I understand that you are getting the "CONCURRENT_MODIFICATION" error. 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 Google Ads UI while updating via the API as well.

We recommend waiting for about 30 seconds, then retrying the request. That being said, you’ll need to ensure that only one operation is performed against an entity at each moment and slow down on the consolidated repeated mutates against the same entity into a single request to avoid this issue altogether.

If the error still persists, could you please provide us with the complete API logs (request and response with request-id and request header) generated at your end without redacting any information?

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 Java, .Net, PHP, Python, Ruby or Perl 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,
 

Google Ads API Team

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[2025-07-30 09:48:12Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01sxDVE:ref" (ADR-00321177)