"autocommit cannot be used inside a transaction" error: trying to use a custom form with a CreateView

Hi,

I get an "autocommit cannot be used inside a transaction" error at the ins.save() line in the model form.

I am trying to use a custom form for a CreateView.

What does this error exactly mean?

Why can't I save the instance?

Thanks

class MyModelForm(forms.ModelForm):
 
  class Meta:
   model = MyModel
   fields = ['field1']

  def save(self, commit=True):
   ins = super(MyModelForm, self).save(commit=False)
   ins.set_some_variables()
   if commit:
     ins.save()
   return ins

class CustomCreateView(SuccessMessageMixin, CreateView):
  form_class = MyModelForm
  template_name ='template.html'
  success_message = _('Congrats.')

  def get_success_url(self):
    return reverse('same_view')

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