Negative Gross Weight in Delivery created from PO

Hello

We are facing an issue where the gross weight on the delivery is being calculated in negative.

In Material Master, gross weight is maintained as 0 and Net weight is 1.

On the PO:

PO qty is 800, but delivery is being created for only 20 KG.

The delivery is created from a PO using VL10D t-code. As a result of the negative value in gross weight, we are getting an ABAP short dump and cannot access the delivery. I do not see anything unusual with the material master setup. The PO is using only KG UOM and no conversion is taking place anywhere. So not sure how the gross weight on delivery is coming out to be negative?

Any advise is appreciated.

Thanks!