Unifi Controller update 7.1.66 to 8.4.62

I have Unifi Controller 7.1.66. I want to update to 8.4.62. All my devices on this controller are updated to their current firmware. Wondering if I make that big of an update if the devices will still report to the controller?

Is your controller a VM? You can make a snapshot and test it out. If it doesn’t work out you can revert your snapshot.