### Begin of the deletion

###End of the deletion Steps to reproduce

Begin of the insertionThis happens on our infrastructure where we have multiple tenants on one instance and a new version is deployed. During deployment, the seeding is run.End of the insertion Begin of the deletion _??_End of the deletion

Begin of the insertionThis is a duplicate of ##62582.

Here is how to mimic the issue:

* Install a fresh instance of OpenProject. This runs db migration and seeding and creates the 2 demo projects: "Demo project" and "Scrum project".

* Delete all the projects

* Run `rake db:seed` as an upgrade would do.


End of the insertion ### What is the buggy behavior?

* Begin of the insertionThe `db:seed` task tries to create the demo projects again and fails because it can't find references to dependent records.

* End of the insertion Appsignal:

* [https://appsignal.com/openproject-gmbh/sites/67c5518749a999507a2c1cef/exceptions/incidents/90](https://appsignal.com/openproject-gmbh/sites/67c5518749a999507a2c1cef/exceptions/incidents/90)

* [https://appsignal.com/openproject-gmbh/sites/681379ae55b0b20ed3735994/exceptions/incidents/10](https://appsignal.com/openproject-gmbh/sites/681379ae55b0b20ed3735994/exceptions/incidents/10)

* Message:

* `Nothing registered with reference :default_role_project_admin`

* `Nothing registered with reference :default_type_task`

* Backtrace:

* app/seeders/source/seed\_data.rb:67 in Source::SeedData#find\_reference


### What is the expected behavior?

Begin of the insertion* There should be no errors.

* Once the seeding has been done once, it should be skipped.

* See #62582 for more ideas / options.End of the insertion Begin of the deletion ??End of the deletion