Hello,
I'm trying to set up an LDAP Replication on two Ubuntu Server. Now i tried to set up the replication using this guide: 
https://systemausfall.org/wikis/howto/LDAP-Replikation

By using this Command:
>>
ldapmodify -Y EXTERNAL -H ldapi:///

dn: olcDatabase={1}hdb,cn=config
changetype: modify 
add: olcSyncrepl 
olcSyncrepl: {0}rid=2 provider=ldap://192.168.XX.YY
type=refreshOnly 
bindmethod=simple 
binddn="cn=syncagent,dc=EXAMPLE,dc=COM" 
credentials=PASSWORD 
interval="00:00:03:00" 
retry="30 10 300 +" 
timeout=1 
tls_reqcert=never 
schemachecking=off 
searchbase="dc=EXAMPLE,dc=COM"
<<

i got this Message:
ldapmodify: invalid format (line 5) entry: 'olcDatabase={1}hdb,cn=config

i have this Data in my slapd file
/etc/ldap/slapd.d/cn=config

'cn=module{0}.ldif'       'olcDatabase={0}config.ldif'
'cn=schema'               'olcDatabase={-1}frontend.ldif'
'cn=schema.ldif'          'olcDatabase={1}hdb'
'olcBackend={0}hdb.ldif'  'olcDatabase={1}hdb.ldif'
'olcDatabase={0}config'

Thank you for you help
best wishes 
Ajdar Yüsün