How to delete a Content ID ?

[Burialfaith]

Greetings,

I couldn't find an answer to this question online, on SE Support Center and on this forum so I guess its not possible, but still: how can one delete a Content ID?

We can only delete the characters via the Characters' selection screen (in-game), but the Content ID (slots) remains. Sure, we can unlink a Content ID from an Handle under POL, but that's not what I am looking for... Also, I haven't seen such an option under the Square Enix Account Management System website.

Thanks in advance,
Best regards,

B