bdb_equality_candidates index_param failed

[Micah Anderson <micah@riseup.net>]

Hi, I have been receiving quite a few of these entries in my logs, and
so far searches on the net have no provided me with any clues as to
what it means, or how I can fix it:

Apr 13 23:27:46 mars slapd[8630]: <= bdb_equality_candidates:
(uidNumber) index_param failed (18)

My relevant details:
Berkeley Sleepycat db 4.2.52
Openldap 2.1.25

slapd.conf:
loglevel 64
database    bdb
cachesize 10000
suffix      "dc=mydomain,dc=net"
directory   "/usr/local/openldap/var/openldap-data"
rootdn      "cn=admin,dc=mydomain,dc=net"
rootpw      mypasswd
index       uid,cn,request                    pres,eq,sub
index       mailusage,mailquota               pres,eq
index       status,mailid,maildrop,lastlogin  pres,eq
index       objectClass                       eq

# The admin dn has full write access
access to *
    by dn="cn=admin,dc=mydomain,dc=net" write
        by anonymous read
    by * read

#moduleload back_monitor
database   monitor
access to dn.subtree=cn=monitor
     by dn.exact=cn=admin,dc=mydomain,dc=net write
     by dn.subtree=dc=mydomain,dc=net read
     by * none

# Increasing threads from the default 
threads 32

# Set the idletimeout for threads
#idletimeout 30

DB_CONFIG:

set_cachesize 2 0 1
set_lg_regionmax 262144
set_lg_bsize 2097152
set_lg_dir /var/log/bdb
# Just use this setting when doing slapadd...
#set_flags DB_TXN_NOSYNC
#set_flags DB_TXN_NOT_DURABLE

micah

---- 
"Naturally, the common people don't want war, but after all, it
is the leaders of a country who determine the policy...Voice or no
voice, the people can always be brought to the bidding of the leaders.
This is easy.  All you have to do is to tell them they are being
attacked, and denounce the pacifists for lack of patriotism and
exposing the country to danger. It works the same in every country."
                                                  -- Goering, Nuremburg trial