Missing airport?

I fly in and out of Goetz County Airport in Onaway, MI very regularly. Why does the airport ID (Y96) kick out of FlightAware as invalid?

It is valid everywhere else I use it - in my Garmin 430W, AirNav, Jeppesen, etc.

Thanks,

Jim
PA32R-301

Please check these discussions:
discussions.flightaware.com/view … ng+airport
discussions.flightaware.com/view … ng+airport
discussions.flightaware.com/view … ?t=1576url
discussions.flightaware.com/view … ght=alaska

In short, some are “missing” because they don’t have ICAO codes.