Usecase to reproduce(or any other way to lower initial demand on move):
- Build a MO with 5 products to do
- Produce 3
- Update the quantity on the mo to 3
-> All the consumed quantity on move lines is dropped.
It happens because lowering the initial demand on a move
will call unlink on its move lines. (increase it will
update the move's state and reassign if it comes from a supplier)
Instead of dropping and reassign the move in order to change
the reservation, it is possible to directly write the new
reserved quantity on the move lines and that will update the
reservation on qaunt directly. Also we don't want move lines
without reserved quantity and quantity done thus we drop them.
closesodoo/odoo#29941
Arnold Moyaux
df7953f303