This type of error is reported whenever you hit this "ReadGroup" quota due a high number deployments. With enough justification, you can request for an increase in the Quota, however, this request is suggest to the evaluation of the Google Cloud Platform team. You can open a request with the
Google Cloud Platform support or on the
Issue tracker. The request would be submitted to the Engineers but these requests are subject to evaluations and there are usually no ETA for the implementation.