The game thinks that my Staffroom is a canteen?

Hey guys...

i asked this on the steam forums, but didnt really get an answer.

Has this happened to anyone else?

I built a staffroom in my prison. It has all the items needed for a staffroom, and works perfectely (staff goes there to rest).

But... there is a warning message in the middle of the room saying "no prisoners assigned to eat at this canteen" (or something very similar to this... dont have my screenshot here at work unfortunately)

So, the game thinks the room is a canteen, even though its working as a staffroom.

As an experiment i took all the items in it, and moved it to another area and marked THAT as a staffroom, and there is no error. I move everything back and mark the old room as a staffroom again, and the error returns.

Any ideas guys?