Difference postings at F-32

Hello Experts,

I have a problem on the difference posting at F-32 (Clear Customer).

The thing is like this.

I have two customer open items, the first one is $10.00 and the second - $4.00.

I'd like to clear above two open items with residual payment and create a new open item, $6.00 with the difference posting function.

So, I double-clicked the field of "Difference postings" (RF05A-AKOBT, SAPDF05X, 3100).

When I did above, new screen was poped up, it is "Clear customer distribution difference" screen.

I don't know why this screen is displayed.

Please let me know how I can do "Difference postings" without popping up additional screen.

As you may know, I didn't see this kind of "Clear vendor distribution difference" screen at F-44 transaction.

I don't think there is a difference between F-32 and F-44 related configuration.

Thanks in advance.

BR,

Chris Kim