Remove a prefix from a batch of files

Thank you for being persistent Johan. I did it and it worked. AND it was easy!

OKAY. So now, I just examined the backup folder for photos taken in 2016 and, for some reason, when I originally imported files the prefix "untitled-" was added to the file name. I am not sure why unless something was set in Lightroom before I imported from the camera.

I do not usually focus on file names. That is one reason for utilizing Lightroom - its database management feature. Nonetheless, I thought the files started off with one name (in the camera) and were magically renamed when imported into Lightroom. I must have inadvertently overlooked a setting prior to initiating the import procedure. I will live with these file names for fear I will mess up the database if I start to batch rename files. Finally, I do not want to manually rename several hundred file names. It is not that important.

In the original example, the original filename is "1010550.RW2". The Metadata does not appear to have a field representing the original filename, only the File Name. I see the example above of the Filename Template Editor, but I am not sure how to utilize it to remove the prefix "untitled-"?

Have you tried renaming back to the original filename - if it is available?

Where does the second part come from? If the second part has some logic in it, like a sequence number, then you could simply rename the images with just that sequence.