Cant change guild server to the one im in?!

Hi guys! basically the deal is… The guild was in earthen ring / darkmoonfaire called Imperial of Orgrimmar, and we moved to Draenor and changed the name to Blue Hooves… the name has been changed, and i can move the guild to any other server BUT Draenor. i keep getting this Error.
dreanor error

I hope someone can help me.

Merry christmas and a happy new year!

Guild already exists on that server and even has a log uploaded.

okay… but i cant leave it and join the new one… so what do i do now? this is so fucking silly…