When adding duplicate group with the API error not handled properly

When you add a duplicate group through the API (in my case using the REST API, but I believe this is general issue), the system gives a database error instead of return a properly formatted error. Since other functions handle errors properly, I do not believe that this is related to the recent REST API patches I created, I think they are a problem in the API itself. If they are related to my patches, I'm happy to try to fix if given a little guidance.