Vortex Wars

ERROR
You are unable to create room because there is already a room with the specified id

What does this mean?

EDIT: i played as a guest, won a game, lost a game. tried to log in and now i'm back with my own acc. But i still don't know what it means

each created room has unique ID, it is used to identify this room, it is created automatically when you create room. 2 things might have happened:
1) you got "lucky" and ID of room you just created was same as ID of existing room. I am not 100% sure that this can happen, even if it can it would be extremely rare case
2) something else went wrong Some special rooms are created with fixed ID, maybe your client created 2 of those rooms by mistake

Wow, my luck...
Thanks for the explanation