macOS Catalina 10.15.2 Developer Beta 2 - update over Catalina release?

Hi.

*Finally* got Catalina to download and install. What a pretty new background we have!

Works great for me (accept TV app won't playback full screen on external monitor (which is why I upgraded)

However, it seems software update now wants to install 'macOS Catalina 10.15.2 Developer Beta 2' over the top of my current install, which I thought was the final release... is this an error? anyone know how to skip it, if it is?

Thanks!