There is another thread with a similar question and a resolution posted. It will really depend on what data is in each of the duplicated accounts. If the duplicate was created during a TurboNET Import and that is the only data in that account you could safely delete that one, enter the BSA ID into the correct account that the Adv Coord has entered advancements to and then do the TurboNET Import again. If there is other non-BSA data in both accounts then I do not believe there is any way to move or merge the data from one account to another automatically.