Account: Debtors - BATQ with currency: ريال can not be selected

Hello all

i start up the ERPNext for our institute BATQ with USD Currency because our currency “Rial” not in the Currency list in startup wizard , After startup i create new currency “Rial” “ريال” and i changed all Accounts currency to new currency “ريال” .

than i create Fee Structure according to new currency “ريال” and i create a New Receivable Account “Receivable Fee” with new currency.
but when i make enrollment for student and submit this message appear
"Account: Debtors - BATQ with currency: ريال can not be selected "


how can i solve it.?