hi all

i try to create 'mail.activity' from 'stock.scrap'

class InheritStockScrap(models.Model):
    _inherit = 'stock.scrap'

    def action_confirm_draft(self):
        for rec in self:
            rec.state = 'inventory_manager_approval'
            group_xml_id = 'stock.group_stock_manager'
            if group_xml_id:
                users = self.env['res.users'].search([("groups_id", "=", self.env.ref(group_xml_id).id)])
                note = 'Please Confirm Scrap Stock ..'
                activity_type_id = self.env.ref('mail.mail_activity_data_todo').id
                for rec in users:
                    self.env['mail.activity'].create({
                        'activity_type_id': activity_type_id,
                        'note': note,
                        'user_id': rec.id,
                        'res_id': self.id,
                        'res_model_id': self.env.ref('stock.model_stock_scrap').id,
                        'date_deadline': datetime.now().date(),
                    })

but faced this error .. any idea ?

ValueError: Invalid field stock.scrap.activity_ids in leaf ('activity_ids.user_id', '=', 2)