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Я работаю над функцией «Добавить в избранное» в django, и я продолжаю получать эту ошибку, когда нажимаю кнопку «Сохранить». отсюда все выглядит нормально, поэтому я не могу сказать, откуда взялась ошибка

Models.py

 from basefunc.models import Accomodation   class Profile(models.Model):  user = models.OneToOneField(User, related_name='profile', on_delete=models.CASCADE)  usertitle = models.CharField(max_length=1000, null=True, blank=True)  city = models.CharField(max_length=1000, null=True, blank=True)  state = models.CharField(max_length=1000, null=True, blank=True)  address = models.CharField(max_length=10000, null=True, blank=True)  about = models.TextField(max_length=10000, null=True, blank=True)  about = models.TextField(max_length=10000, null=True, blank=True)  facebook = models.URLField(max_length=10000, null=True, blank=True)  twitter = models.URLField(max_length=10000, null=True, blank=True)  instagram = models.URLField(max_length=10000, null=True, blank=True)  other = models.URLField(max_length=10000, null=True, blank=True)  phone = models.IntegerField(null=True, blank=True)  zipcode = models.IntegerField(null=True, blank=True)  image = models.ImageField(default='default.jpg', upload_to="profile_pic")  favorite = models.ManyToManyField(Accomodation, related_name='profile')  

views.py

 from userauth.models import Profile  def AccomodationDetails(request, accomodation_slug):  accomodations = get_object_or_404(Accomodation, slug=accomodation_slug)  accomodations_list = Accomodation.objects.filter(status="publish").order_by("-publication_date")  images = Images.objects.all()  categories = Category.objects.all()  features = Features.objects.all()  amenities = Amenities.objects.all()  advanced_features = Advanced_Features.objects.all()   user = request.user.id  profile = Profile.objects.get(user__id=user)      if request.method == "POST":  if profile.favourite.filter(slug=accomodation_slug).exists():  profile.favorite.remove(accomodations)  else:  profile.favorite.add(accomodations)    context = {  'accomodations': accomodations,  'accomodations_list': accomodations_list,  'categories': categories,  'features': features,  'advanced_features': advanced_features,  'amenities': amenities,  'images': images,  }  return render(request, 'accomodation_detail.html', context)  

templateDetails.html

 lt;form action="" method="POST" id="favouriteForm"gt;   {% csrf_token %}   lt;ligt;lt;a href="javascript:void()" onclick="document.getElementById('favouriteForm').submit();" gt;lt;i class="fa fa-bookmark"gt;lt;/igt;lt;/agt;lt;/ligt;   lt;ligt;lt;a href="#"gt;lt;i style="color: red;" class="fa fa-bookmark"gt;lt;/igt;lt;/agt;lt;/ligt;   lt;!-- lt;ligt;lt;a href="#"gt;lt;i class="fa fa-share"gt;lt;/igt;lt;/agt;lt;/ligt; --gt; lt;/formgt;