SAP Message 8A501 - Change not allowed - change payment amount in group & & &

Diagnosis
By changing the item, the +/- sign of another payment would change. Dueto the accumulation process when calculating the withholding tax allpayments to this account are affected. The payment method providedcould thus no longer be used.

System Response
The change is rejected.

Procedure
If you want to change several items in payment, check whether thechanges can be made in another sequence.
Maybe you have to block an item in the other group, before you cancarry out the changes in this group.