Balance Carry Forward value is wrong

Dear Colleagues,

I have run Balance Carry Forward for AP/AR (F.07) in test run. The value of one of the customer accounts in detail log of F.07 differs from the balance shown in FBL5N (same values are also in report S_ALR_87012172 and on the reconcilliation account of the customer).

Can you please advise, what could be the reason? Why F.07 shows wrong value?

Thanks in advance.

Kind regards,

irina