Hi Cindy, In that case, I would recommend keeping the Campaign ID / Ad Group ID - Keyword mapping saved in your local database. You can first perform a basic check on whether an ad group / campaign exists before performing updates on the keyword. Multiple sanity check actions can be grouped into a single operation with a batch job, to optimize the performance. Also, you can set the partialFailure <https://developers.google.com/adwords/api/docs/guides/partial-failure> SOAP header to true so that the operations that fail would be ignored.
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