How can I restore an older version (before the sync)?

I'm using Numbers on my iPad and my Macbook.

Yesterday I opened my Macbook and for some reason it opened the Numbers app but didn't sync.

I didn't really need to work on the file so I just left it open.

A few hours later I wanted to do some work on my iPad.

It prompted me with a "there's a newer version on your Macbook" and asked me if I want to sync to that version.

I actually forgot I didn't do any work on my computer and tapped on the sync button.

Now I lost all of the information since before the sync.

How can I restore the older version on the iPad - before the sync?