Transfer requirement for process order in alternative UoM

Hello

We have a FERT process order that has a material in the BOM defined as a UoM of KG. We require the generated transfer requirement to display the UoM as G.

The base UoM is set as G. The unit of issue and the WM UoM are blank, so default to G as well. But it seems the transfer requirement is picking up the UoM from the process order/BOM.

How can I define it so the transfer requirement is generated with a different UoM or converts back to base UoM?

Thanks