DN index delete failed

[Aaron Richton <richton@nbcs.rutgers.edu>]

My syncrepl provider seems to be missing updates following an upgrade to 
2.3.40. While I was trying to push them through this morning, I got an odd 
message:

Jan 28 08:46:19 slapd[12685]: [ID 588225 local4.debug] conn=234174 op=2 
RESULT tag=107 err=80 text=DN index delete failed


Is there anything I can do about this, or maybe just an idea of where to 
look or what information to take down for next time? I was going to try 
and file an ITS for tracking or maybe to try and walk some structures, but 
the DN in question deleted without incident about ten minutes later.