Inspection lot number generation while doing GR

Hello,

              We have a scenario where we do GR for the same material and same batch twice . It's a subcontracting scenario and the material is drop shipped from supplier to end customer . We do GR & inspection for samples (physically) the first time when the system generates a inspection lot number. The second time we do a GR, it's a virtual GR for the same batch and the system is not expected to generate new inspection lot number .  How can I achieve this . We have assigned inspection type 01 ( against PO) and 02 ( against production order) against the material in the inspection set up of MM. Please help me out here .

Thanks

Sai