Booking Showing Up As Still Owes Balance

A client used a credit to book a session, but when I look at the list of my current bookings, it shows that she still owes a balance.  I know she doesn't, but how can I stop that little red dollar sign from showing up there?

The totally isn't taking into account the credit. I'll make a note of it. Nothing you can do to remove the red dollar sign as it is.