class Person(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=30)

    def get_admin_url(self):
        return reverse('admin:{0}_{1}_change'.format(self._meta.app_label,  self._meta.model_name), args=(self.pk,))

    class Meta(object):
        unique_together = (('first_name','last_name'),)

MIDDLEWARE_CLASSES = (
    ...
    'some_app.middleware.RedirectOnUCBroken',
    ...
)

class RedirectOnUCBroken():
    def process_exception(self, request, exception):
        if type(exception) == django.db.IntegrityError:
            if check_if_that_was_the_case(request):
                return HttpRedirectResponse(proper_url)