Adding New Source Category?

[Steev42]

This may be a generic HeroLab question, but I'm coming from a standpoint of adding things in Pathfinder.

I'd like to create a new heading for my sources. Something along the lines of (say) "User Content" or "Pathfinder Society" that I can then put other sources underneath.

I had assumed that if I created one source (I left the Parent Source blank), and created a second source with the Source Unique ID of the first as the Parent Source, this would do what I wanted. However, whenever I tried to use the child, I would get an error indicating it couldn't find the unique ID of the parent.

Anyone have anything that could help me?