```
AttributeError: module 'posthog.queries.sessions' has no attribute 'Sessions'
(6 additional frame(s) were not displayed)
...
  File "posthog/api/dashboard.py", line 101, in get_items
    update_dashboard_items_cache(dashboard)
  File "posthog/tasks/update_cache.py", line 73, in update_dashboard_items_cache
    update_cache_item(cache_key, cache_type, payload)
  File "posthog/tasks/update_cache.py", line 64, in update_cache_item
    result = _calculate_by_filter(filter, key, team_id, cache_type)
  File "posthog/tasks/update_cache.py", line 144, in _calculate_by_filter
    insight_class = import_from(insight_class_path[0], insight_class_path[1])
  File "posthog/tasks/update_cache.py", line 132, in import_from
    return getattr(importlib.import_module(module), name)
```
posthog/api/test/test_dashboard.py
response = self.client.post("/api/dashboard/", {"name": "Default", "pinned": "true"},)
        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
        self.assertEqual(response.json()["name"], "Default")
        self.assertEqual(response.json()["creation_mode"], "default")
        self.assertEqual(response.json()["pinned"], True)
        
        response = self.client.get("/api/dashboard/").json()
        pk = Dashboard.objects.first().pk  
        self.assertEqual(response["results"][0]["id"], pk)  
        self.assertEqual(response["results"][0]["name"], "Default")  
        
        self.client.patch(
            f"/api/dashboard/{pk}/", {"deleted": "true"},
        )
        response = self.client.get("/api/dashboard/").json()
        self.assertEqual(len(response["results"]), 0)
    def test_dashboard_items(self):