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I was wondering if the following migration is possible with Django south and still retain data. Before: I currently have two apps, one called tv, one called movies, each with a VideoFile model (simplified here): tv/models.py: class VideoFile(models.Model): show = models.ForeignKey(Show, blank=True, null=True) name = models.CharField(max_length=1024, blank=True) size = models.IntegerField(blank=True, null=True) ctime = models.DateTimeField(blank=True, null=True) movies/models.py: class VideoFile(models.Model): movie = models.ForeignKey(Movie, blank=True, null=True) name = models.CharField(max_length=1024, blank=True) size = models.IntegerField(blank=True, null=True) ctime = models.DateTimeField(blank=True, null=True) After: Because the two videofile objects are so similar I want to get rid of duplication and create a new model in a separate app called media that contains a generic VideoFile class and use inheritance to extend it: media/models.py: class VideoFile(models.Model): name = models.CharField(max_length=1024, blank=True) size = models.IntegerField(blank=True, null=True) ctime = models.DateTimeField(blank=True, null=True) tv/models.py: class VideoFile(media.models.VideoFile): show = models.ForeignKey(Show, blank=True, null=True) movies/models.py: class VideoFile(media.models.VideoFile): movie = models.ForeignKey(Movie, blank=True, null=True) So my question is, how can I accomplish this with django-south and still maintain existing data? All three these apps are already managed by south migrations and according to the south documentation it

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