DeDuper script fails with 'unspecified error' on iPhone 16

As I am trying to run the script, I get an error message.

Line: 648

Char:3

Error: unspecified error

Code: 8000 4005

Source (null)

this is on the iPhone 16 with iOS 18.4.1

iTunes version 12.13.7.1

I choose three tracks in the library of iTunes, which are three duplicates for a total of six tracks.

I run the script and get a pop-up box that has three choices. Yes no and cancel both yes and no give me the same error which is above.

What can I be doing wrong?Thanks in advance.

[Re-Titled by Moderator]