Unable to Link Account to MCC

[Shahil Verma]

Hi Google Ads Support,

I'm encountering this error for long time, as I already raised this concern here  - https://groups.google.com/g/adwords-api/c/jwOaSlpfA4g  but could not get any updates.

 
Here is the error -

Account: 2874113998
Exception Message:{
  "StatusCode": 3,
  "Details": "Request contains an invalid argument.",
  "RequestId": "h6GYy0pHtjxriF6XTReMjg",
  "Failure": {
    "errors": [
      {
        "errorCode": {
          "managerLinkError": "INVALID_CHANGE"
        },
        "message": "The change for mutate link is invalid.",
        "location": {
          "fieldPathElements": [
            {
              "fieldName": "operations",
              "index": 0
            }
          ]
        }
      }
    ],
    "requestId": "h6GYy0pHtjxriF6XTReMjg"
  }
}
StackTrace:    at Google.Ads.Gax.Interceptors.UnaryRpcInterceptor.<>c__DisplayClass1_0`2.<Intercept>b__0(Task`1 oldTask)
   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location ---
   at Google.Api.Gax.Grpc.ApiCall.GrpcCallAdapter`2.<>c__DisplayClass4_0.<<CallAsync>g__WaitAndCallHandlers|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Google.Api.Gax.TaskExtensions.WaitWithUnwrappedExceptions(Task task)
   at Google.Api.Gax.Grpc.ApiCall.GrpcCallAdapter`2.CallSync(TRequest request, CallSettings callSettings)
   at Google.Api.Gax.Grpc.ApiCallRetryExtensions.<>c__DisplayClass1_0`2.<WithRetry>b__0(TRequest request, CallSettings callSettings)



I was hoping you could help me figure out what might be causing this issue. I’ve already checked and confirmed that the customer account has the correct access level. The error still occurs even though the user has admin access to the account.

In my case, I’m trying to link my account to another enabled MCC. I have admin access to both the customer account and the MCC, yet the error persists. Could there be any other possible reason this is happening.

Thanks in advance for your help.

[Google Ads API Forum Advisor]

Hi,

Thank you for contacting the Google Ads API support team.

Please note that our team is still working on the issue and one of our colleagues will reach out to you once we have an update. 

Thanks,
 

Google Ads API Team

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[2025-08-29 04:46:49Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01u5Ruz:ref" (ADR-00331278)