I need to upgrade to version 13 but it will not allow me to upgrade via the Upgrade tool, I found this link to upgrade it manually but I am afraid something will break like the last upgrade I attempted. This is the link: https://wiki.freepbx.org/display/FOP/Manually+Upgrading+the+FreePBX+GUI
If you look at the last comment on this page, someone had to run a different mysql command for it not to break. Is this accurate?
While it may be possible, honestly for a system that far back I would just rebuild on 14. There’s bound to be some changes to how things are done that end up being breaking, and it would be a good time to shed old/dead items that may have been overlooked.
Not possible. You can’t. Not something you can do. Not a chance. No way, hombre.
You are going to either have to rebuild from scratch or tough through one of the upgrade scripts, and even then you are not guaranteed to end up with a system that works 100% like what you had before.