Op 12-06-2023 om 17:29 schreef Quanah Gibson-Mount:

It appears you are using the historic back-hdb or back-bdb backend to OpenLDAP. These backends are particularly susceptible to corruption. You should migrate to using the supported backend (back-mdb). You should also upgrade to a supported release series (2.5 or 2.6) as 2.4 hasn't been supported for a few years.

Yes we are in the middle of migrating. :-) The old structure still uses bdb, yes.

While working on new (RHEL9) servers with symas-repo 2.5 openldap, things started happening with the 'old' (but still production) ldap.

Thank you very much for your insights!

Kind regards!