Ishtar

https://sentry.iggdrasil.net/organizations/iggdrasil/issues/16/

TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
  File "django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "archaeological_operations/views.py", line 409, in _modify_parcels
    p_town = int(selected_town)