If you renumbered the files in your operating system, you have made an error which is very difficult to correct.
Basically, you have to click on the exclamation point or question mark icon on each photo, then select the proper renumbered file on your hard disk. I believe you will have to do this file by file, one at a time.
From this point on, you do not manage (move, rename, delete) your photos in your operating system; you need to do all of this in Lightroom.
Thanks for the tip. Problem is... I didn't move them. I wasn't paying a lot of attention as I have gone through this procedure many times. But the program got hung briefly
so maybe something weird happened at that time. It seems to be a mystery. Thanks for getting back to me, I really appreciate it. Danny Darwin