What's "all over again" mean?

Native speaker’s answer
Rebecca
"All over again" means that something is happening again, or for a second or subsequent time. I'd say it's a common phrase and can be used to emphasize that you have to do something again. Ex: Visiting my old school made me feel like I was in high school all over again. Ex: The presentation file was accidentally deleted, so we had to make it all over again.