This traceback arises when the user click on return button. To reproduce this issue: 1) Install 'stock' 2) Activate 'Multi-Step Routes' from 'Inventory/configuration/settings' 3) Create a new product with quantity 100 4) Create a new record in 'Operations/Deliveries' 5) Select the created product in 'operations' with 'Demand' as 10 6) Click on 'Validate' button and then 'Return' button 7) Again click on 'Return' button Error: 'KeyError: 'reserved_qty'' See: https://github.com/odoo/odoo/blob/c2b160fe50c24e9f01d0d5b350f2422cfdbc72d4/addons/stock/wizard/stock_picking_return.py#L86 Because the 'reserved_qty' field is removed from this pr:- https://github.com/odoo/odoo/pull/137864 sentry-4621794958 closes odoo/odoo#142312 Signed-off-by: Adrien Widart (awt) <awt@odoo.com>