When Renaming many photos using the Custom Template, Lightroom will occasionally post-pend a "-2" to the file name unexpectedly.

Once I process all of my photos, my workflow is to delete all of the “rejects” and then rename the remaining photos sequentially.  

I use the following workflow

• Select all photos
• Library | Rename Photos
  • File Naming: Custom Settings
    • Edit…
      • [Custom Text] - [Sequence # (0001)]
    • Custom Text: “DATE EVENT LOCATION”
    • Start Number: 1
    • [OK]
• Expected Result
  • All files are renamed like “DATE EVENT LOCATION - 0001.cr2”, “DATE EVENT LOCATION - 0002.cr2”, ...
• Actual Result
  • Most file are properly renamed
  • About 20 out of 4,000 photos from a particular shoot will be renamed (for a reason I don’t understand, hence the bug report) with a post-pended “-2”
    • “DATE EVENT LOCATION - 0700.cr2”
    • “DATE EVENT LOCATION - 0701-2.cr2”    <--- unexpected result
    • “DATE EVENT LOCATION - 0702.cr2”

This is on a MacBook Pro M4 Max (stock with 4 TB internal) running Tahoe 28.3.1(a) on Lightroom Classic 15.2.1.  This appears less professional than I would like and makes it seem as if there is a “original” version of the “-2” photo that in fact does not exist.