## Bug description

I have lost edit permissions to a [dashboard I created](https://app.posthog.com/dashboard/28987), despite still being listed as the owner of the dashboard

## Expected behavior

I should still be able to edit the dashboard

## How to reproduce

I noticed this problem after adding a new insight, but this doesn't appear to be the cause of the issue. I've duplicated the dashboard to restore access and adding a new insight didn't appear to cause the issue 

## Environment

- [x] PostHog Cloud
- [ ] self-hosted PostHog (ClickHouse-based), version/commit: _please provide_
- [ ] self-hosted PostHog (Postgres-based, legacy), version/commit: _please provide_

## Additional context

#### *Thank you* for your bug report – we love squashing them!

ee/api/test/test_dashboard.py
dashboard = Dashboard.objects.create(
            team=self.team,
            name="Edit-restricted dashboard",
            created_by=self.user,
            restriction_level=Dashboard.RestrictionLevel.ONLY_COLLABORATORS_CAN_EDIT,
        )
        License.objects.all().delete()
        self.organization.update_available_features()
        self.organization.save()
        response = self.client.get(f"/api/projects/{self.team.id}/dashboards/{dashboard.id}",)
        response_data = response.json()
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertDictContainsSubset(
            {
                "restriction_level": Dashboard.RestrictionLevel.ONLY_COLLABORATORS_CAN_EDIT,
                "effective_restriction_level": Dashboard.RestrictionLevel.EVERYONE_IN_PROJECT_CAN_EDIT,
            },
            response_data,
        )