Hello,
I recently tried to switchboot the device running on 11.5 to 10.2.4.
After booting in 10.x, the license was gone. I had taken the backup of bigip.license and tried reloadlic in 10.x, but its...
If it's a lab license, it probably just means the license expired and you need to renew it. Does it tell you "NO LICENSE" on the command line or "LICENSE EXPIRED"?