Can I rollback my library to a previous version?


I have a shared library with all my colleagues. One of my colleague deleated a group set by accident. If we can get all the articles in the “trash”, I don’t see an easy way to get them back in their respective group.

Is there a way to rollback the library to, let’s say, yesterday to undo the mistake done?

Also, to prevent future problem, is there a way to backup my library?