# -*- coding: utf-8 -*-
from odoo import models

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

    def write(self, vals):
        if 'quantity' in vals and any(move.state == 'cancel' for move in self):
            non_cancelled_moves = self.filtered(lambda m: m.state != 'cancel')
            cancelled_moves = self - non_cancelled_moves
            
            res = True
            if non_cancelled_moves:
                res = super(StockMove, non_cancelled_moves).write(vals)
            
            if cancelled_moves and len(vals) > 1:
                vals_no_qty = {k: v for k, v in vals.items() if k != 'quantity'}
                super(StockMove, cancelled_moves).write(vals_no_qty)
            
            return res

        return super(StockMove, self).write(vals)