What I did with this was figured out where the files with that name were (I think I checked the Bin directory and there were several there.

Then I deleted all of the ones with that name or obviously related.

Then, the next time I refreshed the catalog I got a message saying that there was no file by that name; should it delete the catalog entry? I said "yes" and lived happily ever after.

There is a log file in the catalog that gives error messages that might have made it easier, but I had forgotten that.