Depending on the vintage of the hardware in question, newer versions may not be supported.
It’s important to know precisely what the hardware is and depending on target version, it may require replacement as part of this exercise.
Management is the more complicated upgrade and, depending on where that’s at, you may just opt for rebuilding from scratch as that will also involve multiple upgrades that possibly include replacing hardware.
The more details you can provide about current and target state, the more precise advice we can provide.
You may also want to involve your local Check Point SE.