Orphaned url in Radio Station DB

[Skip Pack]

I have been using 8.1.2 on a fresh install since a few days after its release. I added three radio stations with images successfully, and they worked fine. Yesterday, I went to play them, and they had disappeared from the interface. It had been a month or so since I'd looked at the radio station interface, so I don't know when it happened. Since it's so easy, I re-entered two of them quickly and successfully. The third one, however, failed, messaging that there was already an entry in the database for that station's URL. The interface did not show that station. 

I imagine it will be easy to fix, but would like to get some hints, and I'm happy to run diagnostics.

Thanks,   Skip