Hi,
The issue is due to incorrect procedure in changing the calculation schema. Please be careful in changing a condition type / calculation schema in a productive environment. Always follow the procedure explained in the note: 388112 - Change of pricing procedures in the production system
Now, in order to correct the error, maintain the condition type and calculation schema configuration as it was at the time of posting the GR. Now, delete the parked invoice and then cancel the GR as well. Now, make the changes in the pricing procedure and the condition type again and post a new GR and invoice.
Another option would be to remove the acrual flag in the condition type and post the parked invoice. In this case, the delivery cost wont be posted as a separate line.
Please ensure that no other documents are posted while you make the configuration changes, which may create another inconsistency.
Regards,
AKPT