https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27189 Anke <anke.bruns@gwdg.de> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|DUPLICATE |--- Status|RESOLVED |REOPENED CC| |anke.bruns@gwdg.de --- Comment #2 from Anke <anke.bruns@gwdg.de> --- I encounter the same in one of my Koha libraries. In other libraries (instances), even on the same server, the problem doesn't occur. What can be the reason? To solve it, I tried several things which all didn't help: - Created an AnonymousPatron user and set the AnonymousPatron parameter from default "0" to the new AnonymousPatron accordingly. - deleted all entries from deletedborrowers which were duplicates to entries in borrowers. Interestingly, the borrowernumber of the borrower I had tried several times to delete showed up 6 times in deletedborrowers. None of the patrons have a cardnumber starting with a leading 0 (as in Bug #11636). Yet no patron can be deleted. Neither batch deletion nor deletion of a single borrower works. Deletion of a single borrower leads to the error message described here by Nishad Ahmed. Batch deletion leads to Internal server error. -- You are receiving this mail because: You are the assignee for the bug. You are watching all bug changes.