o2m editable list open a form view and can put command as default value (record[this.name] for o2m in a o2m) for the editable fields. When the onchange is triggered, get_value create a wrong command of command. step to reproduce issue: * edit a quotation with at least on sale order line * change the pricelist * change the quantity of the sale order line todo : remove _on_load_record in version > 9.0 and use new dataset implementation with to_delete attribute