configservice subscribe requires sns-topic, but console does not

If I enable AWS Config in the console, choosing to send to an SNS topic is optional. However, the SNS topic is required when enabling the service from the CLI using "configservice subscribe". Does anyone know of a way to enable using the CLI without requiring an SNS topic or a way to uncheck the SNS topic using the CLI afterwards? It seems like the Console and the CLI should function the same in terms of what is required.

Thank you