Duplicate Entry in outlook room list

Ok i have just figured this out, it was something to do with the registry. Go into the registry,

click start, type regedit and hit enter.

I then went into HKEY_CURRENT_USER/Software/Microsoft/Office/14.0/Outlook/preferences

within here their was a string called RoomFinderRecentRoomList

I deleted this entry (i backed up my registry first)

i then restarted my outlook and i know only have 1 entry of my "Room List"

(Also doing a search within your registry looking for the name of your Room list also works)