Error: get() returned more than one ProjectItem -- it returned 2!<br><pre>Traceback (most recent call last):
  File "/app/publications/views.py", line 11, in project_detail
    project = get_object_or_404(ProjectItem, slug=slug)
  File "/usr/local/lib/python3.13/site-packages/django/shortcuts.py", line 90, in get_object_or_404
    return queryset.get(*args, **kwargs)
           ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/django/db/models/query.py", line 638, in get
    raise self.model.MultipleObjectsReturned(
    ...<5 lines>...
    )
publications.models.ProjectItem.MultipleObjectsReturned: get() returned more than one ProjectItem -- it returned 2!
</pre>