AttributeType not found but I have this attribute

[Jose Legido <jose@legido.com>]

Hello.
I'm trying to modify schema (importing from AD) but i have a problem
whith some objectclasses:

ldap_initialize( ldapi:///??base )
add olcobjectClasses:
    ( 1.2.840.113556.1.5.263 NAME 'msImaging-PostScanProcess' SUP top
STRUCTURAL MUST ( displayName $ msImaging-PSPIdentifier ) MAY
(serverName $ msImaging-PSPString ) )
modifying entry "cn={1}core,cn=schema,cn=config"
modify complete


But when I do a test:
57850fb8 olcObjectClasses: value #447 olcObjectClasses: AttributeType
not found: "displayName"
57850fb8 config error processing cn={1}core,cn=schema,cn=config:
olcObjectClasses: AttributeType not found: "displayName"
slaptest: bad configuration file!

But I have this attribute:
ldapsearch -LLL -H ldap://127.0.0.1 -x -s base -b "CN=Subschema"
attributetypes -v

attributeTypes: ( 2.16.840.1.113730.3.1.241 NAME 'displayName' DESC 'RFC2798:
 preferred name to be used when displaying entries' EQUALITY caseIgnoreMatch S
 UBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 SINGLE-V
 ALUE )

I have  openldap 2.4.40 with mode config and inetorgperson.ldif in cn=schema

Thank you!