Following this [docs](https://django-filer.readthedocs.io/en/latest/usage.html#filerfilefield-and-filerimagefield) to create `Company` raises `TypeError: ForeignKey.__init__() missing 1 required positional argument: 'on_delete'` Django: 5.1 django-filer: 3.2.3 Will this be a doc fix to show that `on_delete` is required?
