room can only be added to group, if not yet assigned ,ref #16 was still theoretically possible, by accessing the url
room can only be added to group, if not yet assigned ,ref #16
was still theoretically possible, by accessing the url

chrisma/event-und-raumplanung,hpi-swt2/event-und-raumplanung,hpi-swt2/event-und-raumplanung,chrisma/event-und-raumplanung,chrisma/event-und-raumplanung