It looks like when we re-upload the package, then the model solutions are automatically rejudged, including... all the past model solutions which usually no longer exist.

Traceback (most recent call last):
  File "/home/oioioi/sio2/oioioi/oioioi/evalmgr/__init__.py", line 148, in evalmgr_job
    env = _run_phase(env, phase)
  File "/home/oioioi/sio2/oioioi/oioioi/evalmgr/__init__.py", line 76, in _run_phase
    env = handler_func(env, **kwargs)
  File "/home/oioioi/sio2/venv/local/lib/python2.7/site-packages/django/db/transaction.py", line 223, in inner
    return func(*args, **kwargs)
  File "/home/oioioi/sio2/oioioi/oioioi/programs/handlers.py", line 378, in make_report
    submission, submission_report = _make_base_report(env, kind)
  File "/home/oioioi/sio2/oioioi/oioioi/programs/handlers.py", line 337, in _make_base_report
    submission = Submission.objects.get(id=env['submission_id'])
  File "/home/oioioi/sio2/venv/local/lib/python2.7/site-packages/django/db/models/manager.py", line 143, in get
    return self.get_query_set().get(*args, **kwargs)
  File "/home/oioioi/sio2/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 389, in get
    (self.model._meta.object_name, kwargs))
DoesNotExist: Submission matching query does not exist. Lookup parameters were {'id': 7989}