30128: MessagingServiceSidsAction is invalid

This error occurs when MessagingServiceSidAction uses an unsupported value. Use only ADD, DELETE, or REPLACE.

• The request includes a MessagingServiceSidAction value that is not ADD, DELETE, or REPLACE.

• Update MessagingServiceSidAction to a supported value: ADD, DELETE, or REPLACE.
• Check the request payload for typos or an unexpected action value before you send the request.

• Services resource
• Messaging Services