I seem to have both. Not sure why. The duplicate IDs usually pop up when I'm loading older stuff from my Poser runtimes, probably because I only updated the things I used only in Studio. Will try the script & see if that helps, I don't get it too often. My problem is more a matter of duplicate files, many with some kind of a scroll/script symbol in the icon's upper left corner, if that tells you anything.

Yes, I am a confused little featherbrain.