There are complete instructions for upgrading Rock/4.3 to Rock/5.0 here.
Perhap the most important point to make is that these 5 packages must be upgraded to the version shown before you run sudo dsync --allowerasing.
ncurses-6.4-0
lib64ncursesw-6.4-0
lib64panelw-6.4-0
lib64formw-6.4-0
lib64menuw-6.4-0
You can easily check with the command rpm -qa | grep 6.4-0.
But also very important is that at the end of this process one needs to run:
$ sudo grub2-install /dev/sdx
Where you change /dev/sdx to the location you normally install your boot-loader. For example /dev/sda or /dev/nvme0n1.
Or you may experience a broken boot-loader. Instructions to fix broken boot-loader.