We are new to the service desk and were starting by setting up our request groups and request types first. We realized we didn't pay enough attention to the issue types as we were creating request types and now are in a pickle.
The problem is we've already done a lot of work setting up knowledge base links to the existing request types. As far as I can tell, we must recreate all of the request types using the new issue type values and redo all of the knowledge base associations for the new request types.
I am posting this in the hopes I missed an easier alternate path.