Deactivating Delivery Group Creation in VL10c

Hi,

We are using VL10c for creating deliveries for a list of sales orders. I choose background option in VL10c. When we do this, system is creating group numbers for the deliveries which we don't want. We actually do create the groups in VL06o before we do picking. So we don't want the group numbers to be created twice.

So how can I prevent VL10c from creating the group numbers for the outbound deliveries? Is there a setting to make?

Thanks