Currently all those shared dashboards are removed along with 'non-shared' dashboards and if some other users were using those shared dashboards, the SonarQube UI may become inaccessible for those users.
Scenario to reproduce this issue :
- Let's say 'Fred' is an administrator of the SonarQube platform
- One of his shared global dashboards has been configured to be displayed by default for all anonymous users
- Delete user 'Fred'
- The SonarQube UI becomes inaccessible
Solution : simply don't remove those 'shared' dashboards/filters. Any administrator is able to take the ownership on them.