My Catalina 10.15.2 update won't update. Any clues??

That didn't work but what did work is going into RECOVERY mode at start-up and reinstalling MAC OS for Catalina and it brought in the upgrade. It is now up to date. Hope this helps others when they get glitched!!

What happens when I try? Nothing. It goes back to saying I need an update. Round and round.

Got it! But it didn't work in regular or safe mode. Won't move passed 10.15.1