This error showed up after I added 3 new songs from the database and rearranged some of my existing songs into different folders. I didn't do anything with the data, and I cleared my song cache like always. All the existing songs worked perfectly fine before, but now they get deleted from my SD card when I try and load them in-game. Only these 18 or so songs are affected, the rest of my customs are fine.
I thought it might be a problem with the CONTools, so I updated them to re-convert all of the songs and it still didn't fix anything. I also tried redownloading all my packing files, keeping my ng-id and key, to no avail.
Neither the WiiPackTool or packdlc file give any errors when running, and all the CONs work with the visualizer and song analyzer. I'm a bit lost, any ideas?