Ngăn ngừa việc sinh ra các task timesheet khi chưa nhập xong backdate
Sales Confirmation Backdate - Sales Timesheet
![Sales Confirmation Backdate - Sales Timesheet [11.0.0.1]](https://d92zprevlap4n.cloudfront.net/web/image/odoo.module.version/2028/icon/Sales%20Confirmation%20Backdate%20-%20Sales%20Timesheet%20%5B11.0.0.1%5D?unique=74aecaf){kind=icon}