https://bugs.openldap.org/show_bug.cgi?id=9337
--- Comment #4 from Frédéric Poisson frederic.poisson@admin.gmessaging.net --- I found why the process crash, i didn't configure chain overlay as mentioned inside slapo-lastbind manual:
" lastbind_forward_updates Specify that updates of the authTimestamp attribute on a consumer should be forwarded to a master instead of being written directly into the consumer's local database. This setting is only useful on a replication consumer, and also requires the updateref setting and chain overlay to be appropriately configured."
Once this is configured all is working as desired.
You can close this ITS