Internal document number in &1 also in &2 items of other advice notes

What causes this issue?

The items in the payment advice note were also found in other payment
advice notes.
Check whether distribution lots were generated and posted from more than
one of these payment advice notes.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.