Borrowing in a currency whose value

Q: I borrowed a sum of money (5000 SR) from a friend two years ago. He stipulated that I should repay the money in Jordanian dinar. This amount (5000 SR) equaled 543 dinars at that time, but if I repay him 543 dinars as we agreed, they will be worth (6000 SR). If I repay him 5000 SR, they will now be worth (Part No. 14; Page No. 147) 450 Jordanian dinars, and I will be violating the agreement and decreasing the value of the money. What should I do to repay the money without committing a sin? I would appreciate your advice! May Allah reward you with the best.

A: You must repay the money you borrowed, which is 5000 SR; however, the condition you mentioned is not valid because this is a loan that generates a profit. Furthermore, it is an exchange of money deferring one of the exchanged items, which is not permissible. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.