Compact Central Repository : how to disable ?

I want to avoid that the developers are able to compact their active central repository.

To do so, I have removed the delete-right from the database account with which we connect to the central repository.

Consequently, the compact central repository fails. This is the expected result.

However, I notice that a "Add To Central Repository" operation does not work anymore. (error message saying that there will be a delete in the table AL_OBJ_PERMS)

What is the best way to disable the Compact Central Repository command ?

Thanks