startmat

Yes, the ProductForm is from the given example. Sorry I forgot to post the original error message from Django: ``` File "/home/elem/develop/gitrepos/agate/.venv/lib/python3.10/site-packages/entangled/forms.py", line 162, in __init__ super().__init__(*args, **kwargs) File "/home/elem/develop/gitrepos/agate/.venv/lib/python3.10/site-packages/django/forms/models.py",...