Comment 5 for bug 371023

Well... now that I see it, it is not quite clean... how can I clean this up?:

$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
  linux-image-virtual
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? Y
Setting up slapd (2.4.15-1ubuntu3) ...
  Backing up /etc/ldap/slapd.conf in /var/backups/slapd-2.4.11-0ubuntu6.1... done.
  Moving old database directories to /var/backups:

  Backup path /var/backups/o=cejil-2.4.11-0ubuntu6.1.ldapdb exists. Giving up...
dpkg: error processing slapd (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 slapd
E: Sub-process /usr/bin/dpkg returned an error code (1)