https://bugs.openldap.org/show_bug.cgi?id=10369
--- Comment #9 from elecharny@apache.org --- My bad, it was a copy of a slapd.d files, most certainly converted from a slapd.conf, but it was provided as is, I have no idea how the conversion was done. It's very likely the slapd.conf contained both attribute, converted by a slaptest.