urgent help:FP code 2 for child

My daughter's I-485 was approved, and was asked to do code 2 today, but she accidently hurt her left thumb by a knife yesterday, so they let her reschedule the appointment when my hu*****and brought her there today, I remember someboday said here code 2 is only for ritht index finger and portrait, is that right? do I need reschedule or bring her back to ask again.
Thanks a lot for your information