The release of Korora 23 has been delayed waiting for RPMFusion to get their repos up and running. The beta of Korora 23 used the testing repos and they are working fine so it was decided to release Korora 23 as stable.
If you are running Korora 23 beta there is no need to reinstall. Just keep your system up to date.
The full announcement is here.
Techodyssey 