ارور هنگام آپدیت کردن در msp

با سلام

هنگامی که میخواهم پروژه راآپدیت کنم actual work را که وارد میکنم وتاریخ پایان فعالیت را وارد میکنم ارور زیر را میدهد. دلیلش را متوجه نمیشم

There is a problem with the change you made. The resource can no longer complete the assigned work in the time that was scheduled for the fixed duration task.

For example, suppose you have a 1-day fixed duration task starting on October 17, 2003 with one resource assigned and later you set the same day as non-working for the resource. To complete the eight hours of work assigned to the task, the finish date of the task (and therefore the duration) needs to change to accommodate the resource’s updated schedule