I started a randomization or dispensation visit before the visit date

If you started a randomization or dispensation visit before the start date, you might be able to update the visit start date field so that the visit start date is correct. Some studies allow you to update this field on or after the date when the subject comes in.

The visit schedule is calculated based on the visit start date, so if other visits are scheduled from the visit and you don't update the visit start date, the visit schedule might not be calculated as you expect.