[Koha] Upgrading from Koha 3.18.5.1 to 3.18.6 Problem

[Arslan Farooq]

Hi,

I'm having an error when upgrading the koha-common package on my Debian 7.

Aptitude says:

===========================================
[...]
Unpacking replacement koha-common ...
dpkg: error processing /var/cache/apt/archives/koha-common_3.18.06_all.deb
(--unpack):
 unable to open
'/usr/share/koha/opac/htdocs/opac-tmpl/lib/yui/skin.css.dpkg-new': No such
file or directory
[...]
Errors were encountered while processing:
 /var/cache/apt/archives/koha-common_3.18.06_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
===========================================

Any suggestion what's wrong would be great.

Arslan