Steps to reproduce the bug:
- Create a picking
- Create a line with product "A"
- Validate Picking
- Duplicate Picking
- Add a new line for product "A"
- Validate Picking
Bug:
A missing error was raised.
PS: The function _action_done on model 'stock.move' calls the function _action_confirm
where some stock.move records could be unlinked by function _merge_moves
But the recordset was not updated afetwards.
opw:1885053
closesodoo/odoo#27209