slapd crashed with an "assert failure" in lastmod.c line 593 when using slapmodrn command. Fault is reproducable. Get around is to remove lastmod overlay from config file.
There is no slapmodrdn tool in OpenLDAP suite; I assume you mean ldapmodrdn. In any case, slapo-lastmod(5) is essentially unmaintained and basically useless. I suggest you use slapo-accesslog(5) instead.
p.
Ing. Pierangelo Masarati OpenLDAP Core Team
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