Best way to handle duplicate headings stemming from linked TOC book?

What's the best way to handle duplicate topic titles stemming from TOC books that contain links to a topic that you want to have appear in the body? The problem I've had for years now is that the TOC generates one heading, and the topic itself generates one heading.This results in duplicate headings in the printed output.

I have a large ~2500 topic project I have to print every release, and to date we've been handling it in post-build word macros, but it's not 100% effective, so we're looking to fix this issue on the source side of the fence. On some of our smaller projects, we've actually marked with the heading in the topic itself with the Online CBT and that seems to work. We're thinking of doing the same to our huge project unless there's a better way of handling this. Any suggestions?