Your Coda doc will track and batch the updates you and your team make. And, if you ever need to travel back in time, simply click the dropdown arrow next to your doc name, and choose See version history:
You'll then see a list of edit batches and the editor on the left-hand panel. If you find a version you would like to return to, click Copy this version in the upper right:
You can then copy/paste the data you want to recover back into the main doc, or start fresh with your copied doc.