How to Restore an Accidentally Changed Workbook

Problem Description

Before editing a workbook, no duplicate/copy was created first. Also, the JSON definition of the workbook was not downloaded via REST API as a backup.

After applying changes, the logic within the workbook broke. Now it is necessary to revert back to a former state of the workbook. 

Goal

How to restore an accidentally edited and changed workbook? 

Learn

If the specific workbook ran before and if it was not deleted, there is a possibility to revert back to the state of the last execution. 

To do so: