I get this error when i try to pass the UUID attribute to url parameter. urlpatterns = [ url(r'^historia-clinica/(?P<uuid>[W\d\-]+)/$', ClinicHistoryDetail.as_view(), name='...'), ] views.py class ClinicHistoryDetail(...): ... my_object = MyModel.objects.create(...) ... return redirect(reverse('namespace:name', kwargs={'uuid' : my_object.id})) model.py class MyModel(models.Model): id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False) ... Any suggestions? Continue reading...