I hoped/expected that someone else would post about these errors I received when upgrading from 3.18.11 to 3.18.12. Since no one has ... My system: 1 instance of koha-common running under Linux Mint Debian 2, mysql-server 5.5.46-0+deb8u1, apache2 5.5.46-0+deb8u1 This is a personal-use installation of koha that, despite the errors below, appears to function properly. Screen-grab from apt-get: Preparing to unpack .../koha-common_3.18.12_all.deb ... Stopping Zebra server for mint SIP server for mint not running. Unpacking koha-common (3.18.12) over (3.18.11) ... Processing triggers for man-db (2.7.0.2-5) ... Setting up koha-common (3.18.12) ... Installing new version of config file /etc/koha/zebradb/ccl.properties ... Installing new version of config file /etc/koha/zebradb/marc_defs/unimarc/biblios/biblio-koha-indexdefs.xml ... Installing new version of config file /etc/koha/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl ... Starting Zebra server for mint Upgrading database schema for mint DEV atomic update: hourlyloans.sql C4::Installer::load_sql returned the following errors while attempting to load /usr/share/koha/intranet/cgi-bin/installer/data/mysql/atomicupdate/hourlyloans.sql: ERROR 1060 (42S21) at line 1: Duplicate column name 'lengthunit' DEV atomic update: oai_sets.sql C4::Installer::load_sql returned the following errors while attempting to load /usr/share/koha/intranet/cgi-bin/installer/data/mysql/atomicupdate/oai_sets.sql: ERROR 1062 (23000) at line 35: Duplicate entry 'OAI-PMH:AutoUpdateSets' for key 'PRIMARY' Question: Do these errors need to be rectified? If so, I'm comfortable working at the command line in mysql. Thanks! Bob Elgie