I'm trying to migrate opendj to openLDAP. Here is a customized schema.

===

dn: cn=schema
objectclass: top
objectclass: ldapSubentry
objectclass: subschema
cn: schema
attributeTypes: ( 1.12.23.34.45.56.780 NAME 'active' SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 X-SCHEMA-FILE '99-user.ldif' )
attributeTypes: ( 1.12.23.34.45.56.782 NAME 'accountName' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 X-SCHEMA-FILE '99-user.ldif' )
attributeTypes: ( 1.12.23.34.45.56.784 NAME 'djGroups' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 X-SCHEMA-FILE '99-user.ldif' )
attributeTypes: ( 1.12.23.34.45.56.786 NAME 'departmentId' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 X-SCHEMA-FILE '99-user.ldif' )
attributeTypes: ( 1.12.23.34.45.56.788 NAME 'department' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 X-SCHEMA-FILE '99-user.ldif' )
attributeTypes: ( 1.12.23.34.45.56.790 NAME 'companyCode' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 X-SCHEMA-FILE '99-user.ldif' )
attributeTypes: ( 1.12.23.34.45.56.792 NAME 'parent' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 X-SCHEMA-FILE '99-user.ldif' )
ds-sync-generation-id: 8408
ds-sync-state: 01050186432c61a90000f9ca10880
ds-sync-state: 0105017a002b3170002f4a1b16311
modifiersName: cn=Administrator
modifyTimestamp: 20190711063414Z
objectClasses: ( 1.12.23.34.45.56.880 NAME 'idmExt' DESC 'idm user extended attributes' SUP top AUXILIARY MUST active MAY ( accountName $ djGroups $ departmentId $ department $ companyCode ) X-SCHEMA-FILE
'99-user.ldif' )
objectClasses: ( 1.12.23.34.45.56.890 NAME 'idmDept' DESC 'idm department extended attributes' SUP top AUXILIARY MAY parent X-SCHEMA-FILE '99-user.ldif' )

===

I changed it to LDAP compliant one.

---

dn: cn=djuser,cn=schema,cn=config
objectClass: olcSchemaConfig
cn: djuser

olcAttributeTypes: ( 1.12.23.34.45.56.780 NAME 'active' SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 )
olcAttributeTypes: ( 1.12.23.34.45.56.782 NAME 'accountName' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.12.23.34.45.56.784 NAME 'djGroups' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.12.23.34.45.56.786 NAME 'departmentId' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15  )
olcAttributeTypes: ( 1.12.23.34.45.56.788 NAME 'department' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.12.23.34.45.56.790 NAME 'companyCode' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.12.23.34.45.56.792 NAME 'parent' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )

olcObjectClasses: ( 1.12.23.34.45.56.880 NAME 'idmExt' DESC 'idm user extended attributes' SUP top AUXILIARY MUST active MAY ( accountName $ djGroups $ departmentId $ department $ companyCode ) )
olcObjectClasses: ( 1.12.23.34.45.56.890 NAME 'idmDept' DESC 'idm department extended attributes' SUP top AUXILIARY MAY parent  )

-----

It can be imported by `ldapadd -Y EXTERNAL -H ldapi:/// -f 99-user.ldif`

However, there is nothing in 

===

[root@hq-repo cn=config]#  more cn\=schema/cn\=\{10\}djuser.ldif
# AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify.
# CRC32 310b21fa
dn: cn={10}djuser
objectClass: olcSchemaConfig
cn: {10}djuser
structuralObjectClass: olcSchemaConfig
entryUUID: 6b852150-4b97-103d-86fe-7b79b4eef873
creatorsName: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
createTimestamp: 20230228093837Z
entryCSN: 20230228093837.038174Z#000000#000#000000
modifiersName: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
modifyTimestamp: 20230228093837Z

===

I'm using openldap 2.4. 

Anything wrong with my schema ?

Thanks.