[Koha] Self-Registering Patrons allowed to choose -any- patron category?

[Alvin W.]

I've activated Patron Self-Registration in the Koha library I support and
that seems to be working okay;

Except that on the self-registration screen, the new patron is allowed to
choose whatever patron category he wishes, including those that should be
staff or admin only.

I would prefer self-registered patrons be limited to the default patron
category and only be moved to an more appropriate category after staff
review.

Is there a setting that allows this?

thanks!