Merge behance accounts

I have two behance accounts. One from 2009, before Creative Cloud, and the one that I now have with my CC membership. My Adobe ID has never changed.

I can't change the URL of my new CC Behance account because my name is already in use with my first account.

Please can somebody help.

The two URLs:

https://www.behance.net/michellediamond  - this is the url I want to use my newer profile which is:

https://www.behance.net/m1931

Thanks.