Unable to render {include} The included page could not be found.
When versioning is enabled in site lists, you can track and manage information as it evolves. You can look at earlier versions and recover them, if necessary. That is very handy, for example, when people realize that earlier versions of an item might be more accurate than later ones.
Using Versioning
Configuring File Versioning in SkyDrive Pro
View and Restore Previous Versions of a File in SkyDrive Pro