https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=13518 --- Comment #2 from Jonathan Druart <jonathan.druart@bugs.koha-community.org> --- The problem is that this table is used for the borrower modifications and the self-registration features. So far borrowernumber is the PK (int(11) NOT NULL DEFAULT '0'), for the self-registration feature we can have borrowernumber that is not defined (0 is used) Ideally we would like to have borrowernumber a DEFAULT NULL, and use NULL for self-reg, but then we will loose the PK (PK cannot be NULL). I do not think we will be able to keep the correct constraints at DB level anyway, we will need to handle consistency at code-level. -- You are receiving this mail because: You are watching all bug changes.