Automatic assignment not possible when criteria change

What causes this issue?

You have changed the allocation criteria in the invoice overview.

System Response

The system cannot carry out automatic allocation.

How to fix this error?

The change in the allocation criteria only affect the items selected if
you carry out the check again. To do this, change the Invoice
Verification type to 1 or 2 (Verification in the background) and save
the document.
Alternatively, you can branch into the item screen and change the
allocation criteria. If you wish, changing the criteria here leads to
the allocation criteria being evaluated and possibly to new items being
selected.

Error message extract from SAP system. Copyright SAP SE.