In case of the need to reverse product costing, we should start reversing the transactions from the end to the beginning.

We only need to reverse the transaction that have this option:

KK88 (For the companies using production orders, the transaction is CO88)
KKP5
KKPX
KKN1 (For the companies using production or process orders, the transaction is CON2)

KSII and KKS2 is not possible to reverse.

Important:

After performing the reverse of the necessary transactions we must re-run the product costing process according with the sequence explained in Responsibility area: Perform product costing monthly closing
All transactions must be executed again, even the ones that haven’t been reversed (KSII and KSS2). The system recalculates the related figures without having the need to reverse these steps of the process.