1) Create two playlists with same name 'test' and add then to sync list
2) USB sync them to MMA
=> playlist are added and resulted m3u files are 'test.m3u' and 'test_1.m3u'
3) In MMW rename the first playlist to 'test_1' and USB sync to MMA again
=> UNIQUE constraint failed (playlists._data)
Note that this is because the first playlist now gets the 'test_1.m3u' path too
This scenario is unprobable, but possible..
