FieldDoesNotExist when using field via mixin

[blueyed]

Given:

# from strawberry_django import field as django_field
# from strawberry_django import type as django_type
from strawberry_django_plus.gql.django import field as django_field
from strawberry_django_plus.gql.django import type as django_type

class UrnFieldMixin:
    urn: str = django_field()

@django_type(models.Foo, filters=TrayTypeFilter, pagination=True)
class Foo(UrnFieldMixin):
    ...

I get:

../../../Vcs/django/django/db/models/options.py:669: in get_field
    return self.fields_map[field_name]
E   KeyError: 'field'

During handling of the above exception, another exception occurred:
testing/api/test_foo.py:3: in <module>
    from csd.api.schema import schema
.../schema.py:11: in <module>
    from ...api_types import Baz
.../api_types.py:11: in <module>
    from ....api_types import Bar
.../api_types.py:51: in <module>
    @django_type(models.Foo, filters=FooFilter, pagination=True)
../../../Vcs/strawberry-django-plus/strawberry_django_plus/type.py:379: in wrapper
    return _process_type(
../../../Vcs/strawberry-django-plus/strawberry_django_plus/type.py:276: in _process_type
    fields = list(_get_fields(django_type).values())
../../../Vcs/strawberry-django-plus/strawberry_django_plus/type.py:210: in _get_fields
    fields[name] = _from_django_type(
../../../Vcs/strawberry-django-plus/strawberry_django_plus/type.py:149: in _from_django_type
    model_field = get_model_field(
../../../Vcs/strawberry-graphql-django/strawberry_django/fields/types.py:252: in get_model_field
    raise e
../../../Vcs/strawberry-graphql-django/strawberry_django/fields/types.py:235: in get_model_field
    return model._meta.get_field(field_name)
../../../Vcs/django/django/db/models/options.py:671: in get_field
    raise FieldDoesNotExist(
E   django.core.exceptions.FieldDoesNotExist: Foo has no field named 'field', did you mean ...

When not using a mixin, or when not using strawberry-django-plus it works.

I am happy to debug this further, but would appreciate some pointer(s).