Importing users with the native user importer had duplicated the user roles

Is there a way to delete duplicated user roles?
From the Users & Roles section I can’t cause I receive the message “The role Journal manager is a default one and can’t be removed.”.
All roles are duplicated after the import.

Plus, I have duplicated published articles. How can I delete them? I don’t see the delete button anywhere.
I tried to unpublish, assign to me the journal manager, and tried to find a delete button … without success.

Hello @seventhose,

Can you please indicate what specific version of OJS you’re using (e.g. OJS 3.2.1)?

PKP Team

The latest one. The OJS

Is correct to delete those duplicates directly from the database?