Django: сохранение() запрещено для предотвращения потери данных из-за несохранения связанного объекта 'predictions'

Я создаю проект Django, в котором я использую inline_formset для добавления нескольких форм с фронтенда (так же как и с бэкенда). Я пытаюсь создать новый объект из фронтенда, основные модели сохраняются, но модель, которая является внешним ключом к основной модели, не сохраняется (Inline Model). Я получаю сообщение об ошибке: save() prohibited to prevent data loss due to unsaved related object 'predictions'. Вот мой CreateView код.

views.py

class ProductInline():
    form_class = PredictionForm
    model = Predictions
    template_name = "core/create/create_bet.html"

    def form_valid(self, form):
        named_formsets = self.get_named_formsets()
        if not all((x.is_valid() for x in named_formsets.values())):
            return self.render_to_response(self.get_context_data(form=form))

        # self.object = form.save()
        new_form = form.save(commit=False)
        new_form.user = self.request.user
        new_form.save()

        # for every formset, attempt to find a specific formset save function
        # otherwise, just save.
        for name, formset in named_formsets.items():
            formset_save_func = getattr(self, 'formset_{0}_valid'.format(name), None)
            if formset_save_func is not None:
                formset_save_func(formset)
            else:
                formset.save()
        return redirect('core:dashboard')

    def formset_variants_valid(self, formset):
        """
        Hook for custom formset saving.. useful if you have multiple formsets
        """
        variants = formset.save(commit=False)  # self.save_formset(formset, contact)
        # add this, if you have can_delete=True parameter set in inlineformset_factory func
        for obj in formset.deleted_objects:
            obj.delete()
        for variant in variants:
            variant.product = self.object
            variant.save()

    def formset_images_valid(self, formset):
        """
        Hook for custom formset saving.. useful if you have multiple formsets
        """
        images = formset.save(commit=False)  # self.save_formset(formset, contact)
        # add this, if you have can_delete=True parameter set in inlineformset_factory func
        for obj in formset.deleted_objects:
            obj.delete()
        for image in images:
            image.product = self.object
            image.save()


class PredictionCreate(ProductInline, CreateView):

    def get_context_data(self, **kwargs):
        ctx = super(PredictionCreate, self).get_context_data(**kwargs)
        ctx['named_formsets'] = self.get_named_formsets()
        return ctx

    def get_named_formsets(self):
        if self.request.method == "GET":
            return {
                'variants': PredictionDataFormSet(prefix='variants'),
            }
        else:
            return {
                'variants': PredictionDataFormSet(self.request.POST or None, self.request.FILES or None, prefix='variants')
            }

    

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