And you dont have saved licence ?
Failed RB133c upgrade ?
OK the problem is with with ROS 5.8 and higher. If you want to upgrade to this version you need to watch on RB´s Firmware on old pieces like 112,133,511 and 532 shortly mipsle. If you have very very old Firmware your MK will not be able to boot with ROS5.8 or newer, becuase some error on mounting drive or something.....
So if you have old piece like 133 on 2.9.51 you need to go this safe way:
1) save your old licence (you can use it if something goes wrong)
2) upload ROS 3.30
3) Upgrade your licence key and save the new one
4) upload ROS 4.17
5) upgrade Firmware from terminal "system routerboard upgrade" (you will se than version 2.18)
5a) alternatively you upload 5.4 and click on menu "system/routerboard" and button "upgrade"
6) upgrade to 5.11
If something goes worng you can use netinstall and some ond version of ROS like 2.9.51 and your old licence. Than you can start with another try.
Its always good idea to store licences from all boards (we do) and watch the upgrade proces on serial console if possible.
And the last hope is always the email@example.com
they help very fast with any problem of licencing.
Good luck Karel