Hi,

I am trying to pick up on an old thread of creating an overview page [1]. 
Basically, the idea is to create an overvew slide at the end of a 
presentation that shows the first page of different sections in a 
presentation. Based on Wolfgang's answer in that old thread, I save the 
relevant pages in a box, and then display them again at the end of the 
presentation.

This works, except that I get a series of warnings:

l.86 \placeoverviewpage
                      LuaTeX warning (ext4): destination with the same 
identifier (name{aut:10}) has been already used, duplicate ignored

How do I get rid of these?

I am afraid that I cannot create a small example illustrating this 
warning, so I am attaching the complete test file.

[1]: http://thread.gmane.org/gmane.comp.tex.context/72556/focus=72571

Aditya