trans | Applications

I was wondering if I could get the input of some of the people here. I recently applied to some graduate programs and the schools told me my information is very similar to a previous applicant from when I applied as an undergrad, pre-transition, 7 years ago (I never attended the schools though). I am not sure if I should tell them it is my old information (outing me to schools admission dept.), or if I should lie and tell them I have a twin brother. If I tell the truth it opens me up to discrimination but if I lie it could really hurt me if I get caught, although I am not sure if there is a huge chance of that.

Just wondering if anyone could share their opinions or experiences.