Hi David,
Actually, I'm surprised that you only see one duplicate message instead of thousands!
😉
The message indicates that you have loaded both the pla (archive containing the full library) and the lib (folder structure from having unpacked the library by having openedt the PLA at some point).
Unless you have modified some of the standard library parts, remove the lib in Library Manager and reload and the message should go away.
If this doesn't resolve it, post a screenshot of your Library Manager dialog to show us what you do have loaded.
HTH,
Karl
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators