We understand that mistakes happen, that's why Clipboard allows you to easily delete a whole repeated Series of Sessions. But beware, if you delete a Session, you can't get it back!
To delete a Series of Sessions:
Go to Schedule
Click on any Session in the Schedule that is part of the series that you want to delete
Within the Session's pop up window, click Actions (bottom left) and select the View entire series
Click the three dots icon (top right corner) and select Delete all Sessions from the dropdown menu. Confirm you want to delete the series of Sessions by clicking Yes.
Note: You also have the ability to delete one or more sessions within a series, rather than the whole series. To do this instead, check out this article.

