Rising the comment 8 from bug 30472 to a new bug: Upgrading to 22.11.02-1 from an updated 22.05 on a Debian 11 crash with this error: Upgrade to 22.06.00.048 [18:33:27]: Bug 30472 - borrower_relationships.guarantor_id NOT NULL ERROR - {UNKNOWN}: DBI Exception: DBD::mysql::db do failed: Cannot change column 'guarantor_id': used in a foreign key constraint 'r_guarantor' at /usr/share/koha/lib/C4/Installer.pm line 739 Maybe is the same issue as on bug 32399?. One of the people who sent me a PM suggest a workaround: changing the DEFAULT to NOT on "`guarantor_id` int DEFAULT NULL,".
*** This bug has been marked as a duplicate of bug 33671 ***