How can I control a manual bend deduction value with a design table?

I have been trying to control a manual bend deduction with adesign table but I am at a loss. D1@Sheet-Metal1 is for the insidebend radius. I have tried D2, D3, D4, D5, etc... for the benddeduction but all say they are invalid. Someone please shed somelight on how to do this.

Thanks!SolidworksConfigurations design Tables