Ok, following Nick's advice I found the relevant directory and deleted it using the command detailed in the help section.

The disc still appears under album listing, but now when i click on it it says file not found - it looks like the whole directory has gone, as expected, but...

From ControlMac the track names appear as before, but try to play one and it tries to load it than immediately says played - i got an error message saying can't load media due to a networking problem.

Meanwhile from the C10 the disc appears with a solid red square in place fo a cover pic, and selecting it brings up the same blank background and spinning timer.

So, it appears that I have deleted the audio data, but not the actual listing in the database. Does anyone know how to edit this directly via debug?

Thanks to anyone who has a suggestion!

Nb, obviously I have rebooted in between.

C10, Source One (broken), 1x TwinStore (2x4TB), various DACs, Musical Fidelity A5 pre/power amps into B&W speakers. F80 in bright shiny red.