There will be some hassle involved and the procedure won't be straight-forward. Contact F5 professional services to get assistance with the migration, or find a freelance consultant to help you out.
If you want to try yourself, then prepare a UCS archive file, and attempt to restore configuration from it, using
no-platform-check
and
no-licence
flags (TMSH). You may expect some errors along the way (5-10 errors is normal), and to solve them, you will have to extract the UCS archive, and modify the configuration files in it. When done, you re-pack it, and attempt to load configuration from it once again. Essentially, you will keep suppressing and modifying parts of configuration that are reported as problems on the UCS restore call. You repeat it until the configuration loads successfully. When the configuration load completes, manually re-do parts of the configuration you suppressed. You will also have to manually re-configure your HA. When the previous is done, have a look at
/var/log/ltm
to find additional problems (i.e. TCL errors relating to iRules) or other errors due to changes to behavior.