This involved a small code change to the generated configuration properties snippets: the section id has to start with 'appendix.', otherwise the section-id asciidoctor extension complains.
See #27003
Comment From: philwebb
I like the appending prefix on the section titles, but we should update anchor-rewrite.properties so that older links work.
the format of that file is pretty self explanatory, but it's also covered here
Comment From: mhalbritter
Thanks for the hint, I will update that file.
Comment From: mhalbritter
Updated the anchors file, anchors are now backward compatible.