BSK293 is a callsign / flight number
that regularly goes to/from Gitmo.
Pic related is today's arrivals/departures.
For commercial aircraft (which this is), the flight number does not refer to a specific airframe but to an assigned departure place/time, arrival place/time.
You will see this is true if you look at any commercial airline, that is how they assign flight numbers. It can be a different aircraft. Also when the same aircraft turns around and goes someplace else, its flight number changes to a different number.
https://flightaware.com/live/airport/MUGM