Bug: Deleted dashboards appearing in projects tree-view

[HaynesPostHog]

Bug Description

Bug description

The user in the linked ticket has two dashboards which are listed as an option under Porjects > Dashboards in the tree-view. The user has deleted the dashboards, and when clicking on the deleted dashboard, you are taken to a "Dashboard not found page".

I am unable to replicate this in my own project by creating and deleting dashboards, so I presume that maybe that the dashboards belonging to the user are in a weird state / not fully deleted?

How to reproduce

1. Login as the user in the ticket
2. Navigate to Projects > Dashboard
3. Try and enter either of the dashboards named "New Dashboard", which should be deleted

Additional context

From: https://posthoghelp.zendesk.com/agent/tickets/32465

Debug info

Kind: bug

Target area: analytics

Report event: http://go/ticketByUUID/ee1bcca8-822c-45ea-a5fc-8c2d238247a6

Session: https://us.posthog.com/project/sTMFPsFhdP1Ssg/replay/0197646a-8380-717f-bcc0-859881b83df3?t=2612

Exceptions: https://us.posthog.com/project/2/error_tracking?filterGroup=%7B%22type%22%3A%22AND%22%2C%22values%22%3A%5B%7B%22type%22%3A%22AND%22%2C%22values%22%3A%5B%7B%22key%22%3A%22%24session_id%22%2C%22value%22%3A%5B%220197646a-8380-717f-bcc0-859881b83df3%22%5D%2C%22operator%22%3A%22exact%22%2C%22type%22%3A%22event%22%7D%5D%7D%5D%7D

Location: https://us.posthog.com/project/103405/dashboard/383643

Persons-on-events mode for project: person_id_override_properties_on_events