error_posts.models.MultipleObjectsReturned get() returned more than one ErrorPost -- it returned 2!

Raised by:

django/db/models/query.py (line 338)

Traceback (most recent call last):
  File "python3.5/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "python3.5/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "python3.5/site-packages/django/views/generic/base.py", line 89, in dispatch
    return handler(request, *args, **kwargs)
  File "python3.5/site-packages/django/views/generic/detail.py", line 115, in get
    self.object = self.get_object()
  File "private.py", line 1, in private_function
    private_function()
  File "python3.5/site-packages/django/db/models/manager.py", line 127, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "python3.5/site-packages/django/db/models/query.py", line 338, in get
    (self.model._meta.object_name, num)
error_posts.models.MultipleObjectsReturned: get() returned more than one ErrorPost -- it returned 2!