In our 3-tier hierarchy I installed new PXE roles on existing Distribution Points. I did this on 6 3rd-tier sites.
On 5 of them everything went well. Only 1 doesn't replicate it's configuration to the parent site.

When I go to 'Site Management / <site code - description> / Site Settings / Site Systems' and find the Site System it looks as expected:

However, when looking from the middle-tier site (and also from the central site), it looks like this (just like it was before I installed the PXE role):

Installation was done last week. Should have gotten enough time to replicate.

What's the best way to solve this?

I haven't touched a 2007 site in several years but from memory you may possibly resolve this using preinst.exe /sync parent and /sync child

pxesetup shows no errors.

I'll give preinst a try. Thanks.