Odoo v11

module Follow Lot Serial numbers enabled

Create a sale order with stockable product by 210 kg

(We have 2 lot numbers with 201 kg lot A and 40 kg lot B)

Confirm

Check the delivery product detail for lot numbers reservation:

The system gets 2 lot numbers:

190 kg LOT A

20 KG LOT B

The system dont allow to modify this reservation manually