See
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:AcoustidSubmitter:1962
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:StartMatcher:2791:2791:2791:11899
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzSongGroupMatcher1:2791:2791:2791:11899
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzUpdateSongOnly:0:0:0:0
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzMetadataMatches:583:583:583:2879
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzSongGroupMatcher2(SubGroupAnalyser):6:6:6:15
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzSongGroupMatcher3(WithoutDuplicates):22:22:22:42
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzSongGroupMatcher4(AnalyserArtistFolder):4:4:4:16
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:DiscogsSongGroupMatcher:360:360:360:2705
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:MusicBrainzSongMatcher:1595:1595:1595:1595
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:DiscogsSongMatcher:429:429:429:429
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:DiscogsUpdateSongGroup:1278:1278:1278:5484
20/10/2020 15.20.54:EDT:FixSongsReport:writeToBothLogs:SEVERE: Report:85:SongSaver:3841:3841:3841:15997
songs sent to save is more than songs loaded, problem seems to be related to DiscogsUPdateSongs because when removed this option worked without error.
We now protect SongSaver from processing same song more than once.
But it should not happen in first place, seems to be a problem with either DiscogsUpdateSongGroup or calls to DiscogsUpdateSongGroup
Fixed.