Re: Trying to set up multimaster syncrepl, error attribute 'olcTLSCertificateFile' not allowed , why?

I inherited a pair  of (interestingly configured) ldap servers from a previous owner and I'm trying to get them to replicate to each other (actually, starting with two new VM copies, with the goal of ending up with four masters spread over two data centers). The VM's are running  RHEL6 and openldap 2.4.40. When I try to add replication using the  ldif included at the bottom of this post , I get this error and then cannot restart slapd -- [root@ldap01 tmp]#  ldapmodify  -Y  EXTERNAL -H ldapi:/// -f /tmp/repl.ldif SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 modifying entry "cn=config" adding new entry "olcOverlay=syncprov,olcDatabase={2}bdb,cn=config" modifying entry "olcDatabase={2}bdb,cn=config" ldap_modify: Object class violation (65)         additional info: attribute 'olcTLSCertificateFile' not allowed