Ошибка миграции с трясогузкой 2.0

Привет, я пытаюсь перейти на трясогузку 2.0. Я столкнулся с рядом ошибок, но не могу избавиться от этой, которая возникает при миграции:

  File "/Users/tim/wagtailcmsdemo/home/migrations/0001_initial.py", line 17, in Migration
    ('page_ptr', models.OneToOneField(parent_link=True, auto_created=True, primary_key=True, serialize=False, to='wagtailcore.Page')),
TypeError: __init__() missing 1 required positional argument: 'on_delete'

Любая помощь очень ценится

Спасибо

Тим

Ошибка полной консоли:

(wagtail-isa) MacBook-Air:wagtailcmsdemo tim$ ./manage.py makemigrations Traceback (most recent call last): File "./manage.py", line 10, in execute_from_command_line(sys.argv) File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/core/management/init.py", line 371, in execute_from_command_line utility.execute() File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/core/management/init.py", line 365, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv self.execute(*args, **cmd_options) File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute output = self.handle(*args, **options) File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/core/management/commands/makemigrations.py", line 78, in handle loader = MigrationLoader(None, ignore_no_migrations=True) File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/db/migrations/loader.py", line 49, in init self.build_graph() File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/db/migrations/loader.py", line 200, in build_graph self.load_disk() File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/site-packages/django/db/migrations/loader.py", line 109, in load_disk migration_module = import_module("%s.%s" % (module_name, migration_name)) File "/Users/tim/Virtualenvs/wagtail-isa/lib/python3.6/importlib/init.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 978, in _gcd_import File "", line 961, in _find_and_load File "", line 950, in _find_and_load_unlocked File "", line 655, in _load_unlocked
File "", line 678, in exec_module File "", line 205, in _call_with_frames_removed File "/Users/tim/wagtailcmsdemo/home/migrations/0001_initial.py", line 7, in class Migration(migrations.Migration): File "/Users/tim/wagtailcmsdemo/home/migrations/0001_initial.py", line 17, in Migration ('page_ptr', models.OneToOneField(parent_link=True, auto_created=True, primary_key=True, serialize=False, to='wagtailcore.Page')), TypeError: init() missing 1 required positional argument: 'on_delete'