hi, i was modifying uidNumber attribute of a user but then has been standing for a few minutes and I stopped it:

root@amahoro:~# ldapmodify -x -W -D 'cn=Manager,dc=amahoro,dc=bi'
Enter LDAP Password:
dn: uid=stefano,cn=Admins,dc=amahoro,dc=bi
changetype: modify
replace: uidNumber
uidNumber: 1001

modifying entry "uid=stefano,cn=Admins,dc=amahoro,dc=bi"
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ctrl+c

then with an ldapsearch for this user there was not the uidNumber attribute:

dn: uid=stefano,cn=Admins,dc=amahoro,dc=bi
uid: stefano
cn: Stefano Malini
sn: Malini
gidNumber: 1000
homeDirectory: /home/Admins/stefano
mail: stefano.malini@gmail.com
objectClass: inetOrgPerson
objectClass: top
objectClass: posixAccount
objectClass: shadowAccount
userPassword:: e1NTSEF9b2pNOG1UT3NrT2ZVaDVyd1pUWUpSeWg3YXNxc1lXSHo=
uidNumber: 1001

trying to add it

root@amahoro:~# ldapmodify -x -W -D 'cn=Manager,dc=amahoro,dc=bi'
Enter LDAP Password:
dn: uid=stefano,cn=Admins,dc=amahoro,dc=bi
changetype: add
add: uidNumber
uidNumber: 1001

adding new entry "uid=stefano,cn=Admins,dc=amahoro,dc=bi"
ldap_add: Undefined attribute type (17)
    additional info: add: attribute type undefined

you can see the error message
what is wrong?