I had the same issue upgrading from Koha 22.05.04.001 to 22.05.05.000.
This came in handy -
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=31086
*SOLUTION:*
Log in to MySQL/Maria, change database to the instance DB;
Run;
*ALTER TABLE reserves MODIFY COLUMN `branchcode` varchar(10) COLLATE
utf8mb4_unicode_ci NOT NULL DEFAULT 0;*
Upgrade Schema.
Your upgrade will complete.
Regards
*----*
*EM Njoroge*
On Wed, Oct 5, 2022 at 4:51 AM Steve Nickerson <stevenanicker...@gmail.com>
wrote:
> 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
>
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