"Phantom" entry seen only by slapcat?

[Stephane Bortzmeyer <bortzmeyer@nic.fr>]

With slapcat, I can see two entries for my account while ldapsearch
shows only one. What happened? How do I fix it? (I use slapcat to
backup so if I have to edit the files by hand, it is quite inconvenient.)

OpenLDAP 2.0.23 (the one packaged in Debian stable 3.0)
database ldbm
db3 3.2.9

eve:~ % sudo slapcat|more
[...]
dn: cn=Stephane Bortzmeyer,ou=People,dc=eureg,dc=eu
objectClass: posixAccount
objectClass: shadowAccount
cn: Stephane Bortzmeyer
uid: bortzmeyer
gidNumber: 104
homeDirectory: /home/bortzmeyer
gecos: Stephane Bortzmeyer, AFNIC
loginShell: /usr/bin/zsh
userPassword:: e1NTSEF9YVNiM2pSanRZMTZ4QnVkMTZCbzBhYXhkZmptNUtqQTg=
creatorsName: cn=admin,dc=eureg,dc=eu
createTimestamp: 20021216153733Z
uidNumber: 1000
modifiersName: cn=admin,dc=eureg,dc=eu
createTimestamp: 20021216153733Z
uidNumber: 1000
modifiersName: cn=admin,dc=eureg,dc=eu
modifyTimestamp: 20021217162217Z

dn: cn=Stephane Bortzmeyer,ou=People,dc=eureg,dc=eu
objectClass: posixAccount
objectClass: shadowAccount
cn: Stephane Bortzmeyer
uid: bortzmeyer
uidNumber: 1000
gidNumber: 104
homeDirectory: /home/bortzmeyer
gecos: Stephane Bortzmeyer, AFNIC
loginShell: /usr/bin/zsh
userPassword:: e1NTSEF9YVNiM2pSanRZMTZ4QnVkMTZCbzBhYXhkZmptNUtqQTg=

eve:~ % ldapsearch -x '(uid=bortzmeyer)' 
version: 2

#
# filter: (uid=bortzmeyer)
# requesting: ALL
#

# Stephane Bortzmeyer, People, eureg, eu
dn: cn=Stephane Bortzmeyer,ou=People,dc=eureg,dc=eu
objectClass: posixAccount
objectClass: shadowAccount
cn: Stephane Bortzmeyer
uid: bortzmeyer
uidNumber: 1000
gidNumber: 104
homeDirectory: /home/bortzmeyer
gecos: Stephane Bortzmeyer, AFNIC
loginShell: /usr/bin/zsh

# search result
search: 2
result: 0 Success

# numResponses: 2
# numEntries: 1