Credit memo list is being updated

What causes this issue?

The credit memo list is being updated.

System Response

A database update of table BKPF takes place. Field
<DS:DE.XBLNR>Reference Document Number</> is filled with the credit memo
list number.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.