Current behavior :
When you add a promotion campagn to a PoS the promotion is applied
on every line of every order everytime you load the order. This cause situations
where you have multiple discount for a single product.
Steps to reproduce:
- create a standrard promotion program (automatically applied, 10%)
- set that promotion on the PoS (bar)
- open a session, chooses a table and make an order --> promotion correctly applied
- get out of the table and go back to the same table --> 2 additional lines are created because of the promotion
opw-2699544
closesodoo/odoo#81096
X-original-commit: 72d6431eb26654b697fc0379f4b6d7e305bb79fc
Signed-off-by: Engels Robin (roen) <roen@odoo.com>