[Koha] UNABLE TO CHANGE DEFAULT CURRENCY TO OUR LOCAL CURRENCY

Hi, We are using koha 18.11 running on Ubuntu 16.04. We have added our Local Currency (Naira) and made it the "Active currency", but from the Acquisition preferences on koha administration our local currency does not reflect on currency format. therefore, we are unable to change the default currency to our local currency for the acquisition to work. please i need help. Thank you. Murphy Igbudu Systems Librarian University library and Information Services Benue State University, Makurdi. Benue State, Nigeria. +8038434748