from odoo import models

class StockMove(models.Model):
    _inherit = 'stock.move'

    def _should_bypass_set_qty_producing(self):
        """
        Prevent auto-update of consumed quantity if:
        - The move already has a quantity set (partial consumption).
        - The move is already picked.
        """
        if self.quantity > 0:
            return True
        return super()._should_bypass_set_qty_producing()