What condition "FINAL PAYMENT ROUNDING" action occurs in, when payables is accounted?

Summary:

An invoice has been accounted and successfully paid out.

But, I found out that "FINAL PAYMENT ROUNDING" action occurred in payment history from APList.

I was wondering what condition this "FINAL PAYMENT ROUNDING" action happens and what this is regarding?

In my case, I assume this action was taken for a foreign exchange lose.

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