Add on_delete argument to FKs and OneToOneFields on_delete is a required argument on ForeignKeys and OneToOneFields from Django version 2.0 onwards. Where missing, it was set to CASCADE, as that used to be the default behavior.
Add on_delete argument to FKs and OneToOneFields
on_delete is a required argument on ForeignKeys and
OneToOneFields from Django version 2.0 onwards.
Where missing, it was set to CASCADE, as that used to be
the default behavior.

City-of-Helsinki/linkedevents,City-of-Helsinki/linkedevents,City-of-Helsinki/linkedevents