Some third-party applications that are run after a system has been upgraded may find that the serial number of the installation is not the same as the one under which the application was originally installed.
The installation tries to rebrand the
new kernel with the old serial number during an upgrade.
If this does not work, rebrand the kernel with the serial
number of a previous release using the command:
brand -n old_serial_number old_activation_key /etc/conf/pack.d/kernel/os.a
Then, relink the kernel and reboot the system.