Theerayut Attajak,

It's a new behavior to go faster form the 17.0.

If you want to avoid that into that your workers can check the quantity you need to create a little custom code which is already given here.

Hi Cybrosys

Do you know why odoo automate quantity to the same as demand?
As previous version like odoo 15 they not automate set quantity like this.

Hi,

Please refer to the code below:

from odoo import models

class PurchaseOrder(models.Model):

    _inherit = 'purchase.order'

    def button_confirm(self):

        res = super().button_confirm()

        for order in self:

            for picking in order.picking_ids:

                for move in picking.move_ids_without_package:

                    move.quantity = 0.0

        return res

Hope it helps.