Could not insert metadata … Unable to insert multiple values for subject `urn:uuid:… and single valued property `nmm:musicAlbum'
tracker-extract running under my username logs this line to syslog every 20…30 seconds:
tracker-extract[2520]: Could not insert metadata for item "file:///home/username/Music/cr216-fluechtlingeundhacker.mp3": Unable to insert multiple values for subject `urn:uuid:785b6782-9262-3399-00e2-43a35846de2e' and single valued property `nmm:musicAlbum' (old_value: '172318', new value: '652986')
The file which caused hiccups for tracker is available online. Just press the Download button near page end. This is the document SHA2 sum: 120b3d16f98e47b23277ac3eec2c6dd1125c5d076f2703f3fabd76aff52ab4f0