Did you use drag and drop from a file manager?
It looks like your original issue is still open.
To clean up your DB can Hide the duplicates and then Purge them from the hidden track view. Unfortunately your will loose the history of these tracks.
If you wish to start with a fresh database, you may rename or delete ~/.mixxx/mixxxdb.sqlite
Did you use drag and drop from a file manager?
It looks like your original issue is still open.
To clean up your DB can Hide the duplicates and then Purge them from the hidden track view.
Unfortunately your will loose the history of these tracks.
If you wish to start with a fresh database, you may rename or delete mixxxdb. sqlite
~/.mixxx/