upgrade_index.c: 109: record_size <= INDEX_RECORD_SIZE

[Dilyan Palauzov.]

Hello,

I have installed by accident a 2.5 version of imapd over a running 2.4
version.  Using 2.5 I can do reconstruct, but with 2.4's reconstruct
fails.  The error message is:

fatal error: Internal error: assertion failed: upgrade_index.c: 109:
record_size <= INDEX_RECORD_SIZE

(with "./reconstruct -s user.*" and "./reconstruct -r user.*" and
"./reconstruct -R user.* ").  Running imapd from master logs:

Apr 28 18:54:17 AEGEEserv cyrus/imap[22101]: Fatal error: Internal
error: assertion failed: upgrade_index.c: 109: record_size <=
INDEX_RECORD_SIZE
Apr 28 18:54:17 AEGEEserv cyrus/master[20802]: process 22101 exited, status 75

Can somebody tell me, how can I fix the cyrus-imapd-2.4 installation,
so that the above error message disappears?

Thanks in advance for your help.
  Dilian