A consignment withdrawal is settled with Transaction MRKO. Only an FI Financial Accounting document is posted. If you try to reverse this document in FI, the system displays error message F5673 'Not possible to reverse the document in financial accounting'.
It's not possible to reverse an invoice created in MRKO. You should cancel the consignment document in inventory management first.Then the reversal document should be settled using Transaction MRKO. This is because MRKO does not create an MM document it only creates FI document which cannot be cancelled. As a result, a credit memo is posted. The FI document and this credit memo should then be cleared against each other in FI.