This may be the result of some local apt configuration. It works for me (and others) with default configuration.
What you could do is - make a backup (!!!) - upgrade, allow koha-common and libhttp-oai-perl to be removed - if koha-common 18.05 is not installed automatically afterwards, install koha-common (18.05) again Unless you remove with --purge, your installation should still work and your Koha DB should be upgraded like normal. But as I said, make a backup first. HTH, Mirko Narcis Garcia schrieb am 25.05.2018 > El 25/05/18 a les 11:22, Mirko Tietgen ha escrit: >> thanks a lot for your feedback. I understand you are on 17.11.06 and >> then try to upgrade to 18.05.00, is that correct? > > Correct. > >> >> Narcis Garcia schrieb am 25.05.2018 >>> *The following packages will be REMOVED:** >>> ** koha-common libhttp-oai-perl* >> >> This indicates there is a problem with libhttp-oai-perl. The version >> in Stretch (4.03) is broken. To provide the OAI functionality of >> Koha, there is a backported version libhttp-oai-3.27-perl for >> systems that ship libhttp-oai-perl 4.x. This version conflicts with >> the systems libhttp-oai-perl. >> >> However I can't reproduce the problem. On upgrade I get warnings, >> but libhttp-oai-3.27-perl is installed and Koha is upgraded. >> >> Could you share the output of >> >> apt-cache policy koha-common > > koha-common: > Installed: 17.11.06-1 > Candidate: 18.05.00-1 > Version table: > 18.05.00-1 500 > 500 http://debian.koha-community.org/koha stable/main i386 Packages > *** 17.11.06-1 100 > 100 /var/lib/dpkg/status > >> apt-cache policy libhttp-oai-perl > > libhttp-oai-perl: > Installed: 4.03-2 > Candidate: 4.03-2 > Version table: > *** 4.03-2 500 > 500 http://mirrors.ircam.fr/pub/debian stretch/main i386 Packages > 100 /var/lib/dpkg/status > >> apt-cache policy libhttp-oai-3.27-perl > > libhttp-oai-3.27-perl: > Installed: (none) > Candidate: 3.27-1~koha+1 > Version table: > 3.27-1~koha+1 500 > 500 http://debian.koha-community.org/koha stable/main i386 Packages > _______________________________________________ > Koha mailing list http://koha-community.org > Koha@lists.katipo.co.nz > https://lists.katipo.co.nz/mailman/listinfo/koha > _______________________________________________ Koha mailing list http://koha-community.org Koha@lists.katipo.co.nz https://lists.katipo.co.nz/mailman/listinfo/koha