Musicbrainz Picard often exits with error while saving files. The traceback is listed as below:{{}}

}}{{Traceback (most recent call last):
   File "/usr/lib/python3.7/site-packages/picard/tagger.py", line 388, in event
     event.run()
   File "/usr/lib/python3.7/site-packages/picard/util/thread.py", line 39, in run
     self.func(*self.args, **self.kwargs)
   File "/usr/lib/python3.7/site-packages/picard/file.py", line 335, in _saving_finished
     self.update()
   File "/usr/lib/python3.7/site-packages/picard/file.py", line 573, in update
     self.update_item()
   File "/usr/lib/python3.7/site-packages/picard/file.py", line 752, in update_item
     self.item.update()
   File "/usr/lib/python3.7/site-packages/picard/ui/itemviews.py", line 845, in update
     color = FileItem.file_colors[file.state]
KeyError: 4
fish: "picard" terminated by signal SIGABRT (Abort)