Dear all,

I want to add extra cost other than the product cost, such as transportation, freight, loading, or even customs.
I want to add these costs together, and then distributed to the products or POs i choosed, in order to recalculate the price in the PO itself, and update it in inventory.
I tried to use Landed Cost but i couldn't perform such calculation, I also tried to perform it using Purchase Cost Distribution but when click on Update i got that error:

Integrity Error

The operation cannot be completed, probably due to the following:
- deletion: you may be trying to delete a record while other records still reference it
- creation/update: a mandatory field is not correctly set

[object with reference: journal_id - journal.id]

Can any one help me with this please.
Thanks