https://bugs.openldap.org/show_bug.cgi?id=9688
--- Comment #1 from dpa-openldap@aegee.org dpa-openldap@aegee.org --- In fact, apart from saying, that the EQ index is mandatory, the manual pages adds “When using the session log, it is helpful to set an eq index on the entryUUID attribute in the underlying database.”
So the manual page is inconsistent, whether the index is mandatory or helpful.