@Gavin99
That has to be a website malfunction. I noticed that it’s slow and some things aren’t working right now.
Obviously you don’t want to give a 96% discount, so don’t accept the booking yet.
I would tell the guest that there’s a website malfunction, apologize for Airbnb, and tell him that you will hold those dates for him until things get fixed.
He would probably appreciate it if you could tell him what the actual price should be.
You might try resetting your discount to zero and then put it back to whatever you want it to be.