Allowing over and under delivery on Procurement category Receipts

Hi Everyone,

I am using Dynamics 365 and Procurement and sourcing parameters are setup with allow over and under receipts and we are using procurement categories. While entering an over / under receipt I am getting a message that "Overdelivery of line is 100.00 percent, but the allowed overdelivery is only 0.00 percent"

Can any one guide me what setup I am missing here.

thanks

Navneet