prevent INBOX rename

[mj]

Hi,

One of our users managed to rename her INOX folder to ' ' (space)

This caused a new INBOX directory to be created, and all older emails to 
become 'invisible' to her.

My question: Is there a (dovecot config) way to prevent this from 
happening? We cannot image any scenario where we would like a user to be 
able to rename INBOX.

> imap(username)<12135><bsJbjpO9gN7AV48G>: Mailbox renamed: INBOX ->

Debian buster, dovecot 2.3.4.1

Thanks!