Hard Commitment & Lot Assignement

Hello JDE Experts,

I have two questions related to Commitment and Lot Assignment.
1. Is there is any way to uncommit the inventory which is already hard committed.
2. If The branch Plant set up for an item and BP mandates Lot/ Serial Number assignment is it possible to set up the system in a way that during the sales Order entry only system asks for Lots instead of ship confirm process.

Regards,
Anshu