Good evening everyone, I'm trying to upgrade a Koha environment from 19.11.03.000 to the latest 22.05.04.000, including upgrading Debian OS from jessie to stretch. This was originally a package install on Debian Jessie. I did the upgrade successfully in a "test" environment and am now trying on my production system. After my first attempt I got the "welcome to Koha, please login using the default Koha user' screen, so I deleted that DB completely and restored from the backup I took right before the upgrade. Now when I try to execute 'koha-upgrade-schema <koha_site>' I get: Upgrade to 22.05.04.002 [21:40:11]: Bug 31086 - Do not allow null values in branchcodes for reserves ERROR - {UNKNOWN}: DBI Exception: DBD::mysql::db do failed: Cannot change column 'branchcode': used in a foreign key constraint 'reserves_ibfk_4' at /usr/share/koha/lib/C4/Installer.pm line 739 Any ideas? Thanks! Steve