@Eugenia17 No, it won't be removed unless you can find some way in which it violates the Airbnb review policies.
It's entirely possible that the guest actually intended to leave 5*s and got confused or accidentally hit the wrong button. That has happened to other hosts. You can message the guest and ask why he only rated 1*, was there something wrong?
If the guest says it was an error, explain to them that it will cause you to lose your Superhost status and has tanked your rating and would they please call Airbnb, explain, and ask that their review and rating be removed.
Ratings and reviews won't be altered, even if the reviewer says it was an error, but users, either hosts ir guests, can request that their own review be removed.