issue with importing the samba3 schema

Hello,

I'm trying to migrate an old openldap installation to a new one. OS of the new one is SLES15SP3, we are using the symas 2.5 packages.

Sadly I got an error by importing the samba3 schema:

# /opt/symas/bin/ldapadd -Y EXTERNAL -H ldapi:/// -f /opt/symas/etc/openldap/schema/samba3.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 adding new entry "cn=samba3,cn=schema,cn=config" ldap_add: Constraint violation (19) additional info: structuralObjectClass: no user modification allowed

I'm able to import other schemas in the same way, si I don't think that I hold the tool in the wrong way.

Any pointers for me?

Best regards Ulf