Delivery costs for & & will not be copied

What causes this issue?

Delivery costs for item &V2& of purchase order &V1& will not be included
in the document, as a negative moving average price of material
&V3& would occur if this item were to be posted.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

The system does not allow a negative moving average price.

How to fix this error?

Check your entry in field <LS>Amount</>.
If you made a mistake, choose <LS>New entry</> and correct the
amount.
If your entry was correct, first acknowledge the message.
The document overview screen appears. The item in question is not
included on this screen.
For material &V3&, check
the stock value
(Environment -> Master data info -> Display material)
the PO history
(Environment -> Line items -> By material).
You may have to cancel previous postings (for example, due to goods
receipts that were valuated wrongly or a wrong price change) before
you can post the document.

Error message extract from SAP system. Copyright SAP SE.