NO you don't
All you do is go to settings/Windows Update/Windows insider Program
there is a switch you can turn off to stop getting insider versions but still get updates until the next version of win 11 is released. No need to clean install.
That is if you on Beta version
If you're in the Beta Channel or the Release Preview Channel, you can flip the switch to stop stop getting preview builds on your device when the next major release of Windows launches to the public.
If you're in the Dev Channel or you'd like to stop getting preview builds immediately, you should use these instructions to complete a clean installation of Windows.
The links here are wrong lol. MS don't even know where it is in there OS...