I'm relatively new to working on sheet metal parts and have some limited bend deduction/K factor info specific to my companies equipment. I've designed a bracket in 8mm mild steel but didn't have specific BD values for 8mm so went with the nearest for 6mm (BD 11.5767mm) and it seemed to work okay.

Now I need to change the bracket to 6mm to save some weight but get and error when flattening the part