Moving average price for material would be negative: & & & &

What causes this issue?

This item would create a stock value posting which would result in a
negative moving average price for the material.
INCLUDE MM_IV_MELDUNGEN OBJECT DOKU ID TX

System Response

The system does not allow a negative moving average price.

How to fix this error?

Check your entry in the field "Amount" and correct it if necessary.
If your entry is correct, check the following for the material
the stock value
(Environment -> Master data info -> Display material)
the posting history
(Environment -> Line items -> For material).
It might be necessary to cancel past postings (for example, incorrectly
valuated goods receipts or incorrect price changes), before you can
carry out your posting.
If you wish to carry out a <ZH>price change</>, the total stock of the
material may be negative. A price cannot be changed if the stock is
negative.

Error message extract from SAP system. Copyright SAP SE.