In prior years i have flown a CRJ200, designated CL65 by Bombardier. I have all my entries logged in the 200 as CL65. Now years later i get to fly another CL65 except this one is a CRJ900 and in a different weight class than the 200. I would like to differentiate the 2 in my logbook. How can i go back and reallocate allmy previous CL65 time as CRJ200 time?