Just for information to anyone with issues with TrackStat and duplicated
musicbrainz identities.

In the latest TrackStat version (3.1.3814) which I just released there
is an option in the TrackStat settings page to disable the musicbrainz
tag related logic.

If you haven't had any issues you are probably not affected, the issues
are typically shown as startup performance issues or inability to
set/view ratings. If you haven't seen any of these you can probably keep
using TrackStat as usual and don't have to disable musicbrainz
integration. Also, if you don't have musicbrainz tags in your music
files you are definitely not affected as this issue only affects people
with musicbrainz tags.

If you want to check for potential issues you can do as follows:
1. Install the free Database Query plugin
2. Got "Extras/Database Query" in the web interface and execute the
"Squeezebox Server Inconsistency/Problems" query and look for the
"Duplicate musicbrainz song tags" value. If it says "No" you are fine.
3. To further test it, you can also run the "TrackStat
Inconsistency/Problems" query and look for the "Duplicate entries in
TrackStat statistics" parameter. If it says "No" you are definitely
fine, if it says "Yes" and have a high number you should either correct
your musicbrainz tags (if they are incorrect) or disable the TrackStat
Musicbrainz integration in the TrackStat settings page.

The process to get rid of any existing duplicates are as follows:
1. For extra safety, shutdown SBS/LMS and take a backup of the SBS/LMS
cache folder which contains the database. This will make it easy to
recover later if something goes wrong.
2. Disable the Musicbrainz integration in TrackStat settings page
3. Do a TrackStat backup and make sure the file is written properly and
contain a lot of data
4. Use the "Remove all data" button in TrackStat settings page (Backup
section) to delete all TrackStat data
5. Restore the TrackStat backup, wait until the server.log file
indicates that the restore operation is finished.

Finally, note that duplicate musicbrainz identities is not necessarily a
tagging error, because Musicbrainz changed principles a year or two
ago:
- Previously each track had a unique identity
- Now two tracks have the same identity as long as they both represent
the same recording of a song. Typically this happens if one owns a
normal album and a compilation album which both contains the same song
from the same recording.

So unfortunately this means that musicbrainz identities are no longer a
unique identification of a music file and due to this there are some
issues both in TrackStat and SBS/LMS related to this. Fortunately most
people aren't affected much since it usually only affects a few tracks
in a library.

If you select to disable musicbrainz integration will means that
TrackStat will no longer be able to keep statistics when you move or
rename music files.


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