Trade level &2 is not intended for re. partner &1

What causes this issue?

For recycling partner &V1& the trade level &V2& has been assigned to an
article or a packaging in the system.

System Response

Trade level &V2& can, however, not be settled for recycling partner
&V1&. Therefore settlement may be incorrect.

How to fix this error?

Correct maintenance of trade levels for recycling partner &V1& and and
the articles and packagings settled with this partner.

Error message extract from SAP system. Copyright SAP SE.