It doesn’t matter if they want them. They loaned dollars and they’ll get dollars. Debt paid.
You can’t loan me 5 coconunts with a signed contract that I’ll pay you back with 6 coconuts next year, then refuse the 6 coconuts when I present them just because you like pineapples better and there are suddenly too many coconuts.
You shouldn’t have loaned coconuts to the coconut farmer just as the farmer was increasing production.