I used the upgrade module to upgrade to FreePBX 12. AFter all the installation is finished, everything is working well. I logged into the SSH via putty to check the pbx-version and it still says 5.211.65.17. Do I need to run the upgrade script to convert the Centos side to the 16.12 track?
Yes you need to use the script to take you to the 6.12.65 track