Multiple ou entries are added

Hi, If I add following ldif with slapadd(attribute 'ou' and 'ou' in dn: are different): dn: ou=testou.auto,dc=my-domain,dc=com ou: testou.misc objectClass: top objectClass: organizationalUnit

Slapadd doesn't evalute it as an error in ldif but it adds 'ou' from dn as another attribute. Added entry then looks like: # testou.auto, my-domain.com dn: ou=testou.auto,dc=my-domain,dc=com ou: testou.misc ou: testou.auto objectClass: top objectClass: organizationalUnit

Is this expected behavior or a bug? Tested with openldap-2.4.39