I've got a (K)ubuntu 20.04 system, as far as I can see:

$ cat /etc/lsb-release 

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=20.04

DISTRIB_CODENAME=focal

DISTRIB_DESCRIPTION="Ubuntu 20.04.5 LTS"

and I'm getting this notification in my tray area:

Upgrade available

Ubuntu on 22.04.1 LTS.

This version will stop receiving updates and security fixes in 124 days.

First, what is "this version"? 22.04.1 LTS or the current installed version (unidentified in the message, but 20.04.5 LTS as shown above)?

Second, I thought LTS means 5 year support, so it doesn't seem to agree with any of them. So what's the catch here? Is it a bogus message or what?