Can you explain your situation a little more?
Ok. What are you hoping to achieve?
Well, if it is a rape then it is a rape. There is no particular distinction arising from the age of the complainant save for sentence.
Unless this is an offence charged on the basis of ostensible consent negated by age then it wouldn't make any difference to the law.
However, their records should be accurate.
That said, if they have recorded this as a 16 year old and she is over 16 slightly then that really matters not. It is the same offence and the same sentencing bracket.
Can I clarify anything for you?