Backup GEDCOM import done. Page displays and proper image added. All better. As for default prefix, that was set exactly seven years ago, Dec 2007, when I started using PhpGedView 4.1.5. I never used “I” at the very start of things and never since.
WOW. 2007 with just under 500 records and no hope that I’d ever make 600 let alone just shy of 20,000!