[Q] Question about flashing a rom for the very first time - Resurrection-Remix

So I am being cautious here.

They mention this:

you will need to flash a latest cm12 nightly before flashing this build AFTER my RR 5.3.0 builds to avoid reboots and bootloops!

I have no idea what this means. Is this valid for in my case? I am currently running stock (just got my One this week).

Thanks!