trying ldpa configuration, can't add user, ldap_add: Invalid DN syntax (34) additional info: invalid DN - linux

Question

I am trying to setup ldap configuration and ldpa authentication: so by surfing on internet i came across this video Setting up OpenLDAP Server : LDAP configuration and LDAP authentication
following all the steps same as in video, i am having a error while adding the user i think!
did this on PuTTY
Error which i am getting
after running same code 2nd time it say:
adding new entry "ou=People,dc=vlabs,dc=local"
ldap_add: Already exists (68)
this is my .conf file
.conf file
and this my add_content.ldif
dn: ou=People,dc=vlabs,dc=local
objectClass: organizationalUnit
ou: People
dn: ou=Groups,dc=vlabs,dc=local
objectClass: organizationalUnit
ou: Groups
dn: cn=Students,ou=Groups,dc=vlabs,dc=local
objectClass: posixGroup
cn: Students
gidNumber: 5000
dn: cn=University,ou=Groups,dc=vlabs,dc=local
objectClass: posixGroup
cn: University
gidNumber: 6000
dn: uid:fct,ou=People,dc=vlabs,dc=local
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
uid: fct
sn: falcon
givenName: fct
cn: fct falcon
displayName: fct falcon
uidNumber: 10000
gidNumber: 5000
userPassword: fctfalcon
gecos: fct falcon
loginShell: /bin/bash
homeDirectory: /home/fct
dn: uid:user,ou=People,dc=vlabs,dc=local
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
uid: user
sn: test
givenName: user
cn: user test
displayName: user test
uidNumber: 11000
gidNumber: 6000
userPassword: usertest
gecos: user test
loginShell: /bin/bash
homeDirectory: /home/user
dn: uid:abc,ou=People,dc=vlabs,dc=local
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
uid: abc
sn: def
givenName: abc
cn: User def
displayName: abc def
uidNumber: 12000
gidNumber: 5000
userPassword: abc
gecos: abc def
loginShell: /bin/bash
homeDirectory: /home/abc
tried to add one more user which is uid:abc to get different result bu same error
while running this code there is no user there, uid i think uid is not been able to store in database.
another code
no idea where its going wrong, if anyone know solution PLEASE EXPLAIN in DETAIL.

Answer 1

Well, the ldap_add: Already exists (68) is due to the ou named ou=People,dc=vlabs,dc=local already existing. This is more of a warning than an error.
For:
dn: uid:abc,ou=People,dc=vlabs,dc=local
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
uid: abc
You are setting the uid to abc on the last line. Get rid of the uid on the first line:
dn: abc,ou=People,dc=vlabs,dc=local
or:
dn: uid=abc,ou=People,dc=vlabs,dc=local
and then don't do the uid assignment.