I don’t believe there’s an automated way to do that. If you have dozens of them then you should likely automate it at the rails console, but it’s likely easier to do it at the ux unless there Ara lots of them. You can type
Category.create
To see the fields a category has and then something like
Category.create (name: 'the title'......)
And supply enough information for the command to succeed. There is also Administrative Bulk Operations that might have clues.