vb.net ClickOnce application deployment issue

vb.net ClickOnce application deployment issue

Hi there I have an issue with my ClickOnce application deployment. The
issue is that I built the application with the .net framework 4.5 and had
that deployed. (all working fine!) But then I have downgraded the .net
framework to version 2.0 then when I publish that version it still says:
The following prerequisites are required:
Microsoft .NET Framework 4.5 (x86 and x64)
The reason I have downgraded to .net framework 2.0 is for compatibility
reasons.
It's probably something simple that i'm missing?..