well it is an area being built, try savearea and foldarea commands. links to prototype areas might be removed on save/load. not sure right off if afkmud aut loads prototype areas or not, if it doesnt then you have to type loadarea to load it and if its not auto loaded its probably giving a log/bug message on boot about the exit in question. you could of course use installarea to install the prototype area and then it will be loaded every boot, just have to use a different saving command which I think is foldarea on installed areas.