Negative cost amount for receipts is not allowed even if the realized cost amount on price calculation form is positive, in a production order

Hello to all,

I have 1 production order that gives me an error when I run the "End" process. It says that the cost amount is negative

even if checking the realized cost amount I see a positive value

About the 3 rows in negative quantity: in order to force the amount of the transactions in Receive status, I already used the Marking function to link for each item the row in negative qty with the related in positive quantity. In this way I am expecting that the total amount for each item is zero except the last row which I add in order to give to the order a final positive value for 1€.

Thank you in advance