I ran into an issue after updating my cube prefab where the label didn’t update correctly on all my cubes. Reverting a cube back to the prefab fixed the label but could only be done to a single cube at a time. With about 50 cubes needed to be reverted and no mass selection operation was possible, I found a script that could help (link below). The script worked great and I was able to revert all my cubes back at once. I hope this helps others!
https://answers.unity.com/questions/144453/reverting-several-gameobjects-to-prefab-settings-a.html