GR against Outbound delivery instead of Inbound delivery

Hello all,

STO has confirmation ctrl key "Inbound Delivery".

Business has two requirement

1. To create IBD after PGI against OBD - which is done

2. To post GR against Outbound Delivery insetad of Inbound delivery.

So how to fullfill the 2nd requirement ? MIGO gives error to use VL32N. But business want 2nd option.

Any suggestion on how to resolve the issue...??

Thank you

Tushar