Hi Bala,
you could use inbound deliveries to do the HU packing.
Assuming that your storage location where you post goods receipt for production order is HU managed.
You try to post GR for PrOrd#1 but get an inbound delivery then because storage location forces to have HUs. Same for PrOrd#2.
You can now pack each IDLV item in one separate HU (mixing different IDLV items in one HU des not work), post GR for each HU to get unbound stock, then you can repack HU content together (e.g. with HUPAST or HU02)
Best regards,
Matthias