We made several attempts to restore a directory backup server VM utilizing Veeam using backups from different Days. After the server start slapd is not up.
systemctl status slapd
● slapd.service - LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol)
Loaded: loaded (/etc/init.d/slapd; generated)
Active: failed (Result: exit-code) since Tue 2023-04-25 12:05:05 UTC; 44min ago
Docs: man:systemd-sysv-generator(8)
Process: 27356 ExecStart=/etc/init.d/slapd start (code=exited, status=1/FAILURE)
Apr 25 12:05:05 ucs slapd[27368]: DIGEST-MD5 common mech free
Apr 25 12:05:05 ucs slapd[27368]: DIGEST-MD5 common mech free
Apr 25 12:05:05 ucs slapd[27368]: slapd stopped.
Apr 25 12:05:05 ucs slapd[27368]: connections_destroy: nothing to destroy.
Apr 25 12:05:05 ucs slapd[27356]: Starting ldap server(s): slapd ...failed.
Apr 25 12:05:05 ucs slapschema[27371]: Loaded metadata from "/usr/share/univention-management-console/saml/idp/[ucs-sso.ourdomain.com](http://ucs-sso.ourdomain.com/).x
Apr 25 12:05:05 ucs slapd[27356]: 6447c1f1 /etc/ldap/slapd.conf: line 213: unknown attr "clientsecret" in to clause 6447c1f1 <access clause
Apr 25 12:05:05 ucs systemd[1]: slapd.service: Control process exited, code=exited, status=1/FAILURE
Apr 25 12:05:05 ucs systemd[1]: slapd.service: Failed with result 'exit-code'.
Apr 25 12:05:05 ucs systemd[1]: Failed to start LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol).
We are grateful for any useful hint.