It is not possible to credit note (or copy precisely) any purchase order imported using DMF if the lines do not have the exact same fin.dimensions filled as it would have if created manually.

Demanding all integrations to follow the internal logic of adding financial dimensions is an extreme harsh requirement.

If at one time a new financial dimension is introduced and set up to be filled on all new PO lines, it will be impossible to credit note (or copy precisely) any existing PO in the system.