I get this error when I try and save a z-39 or an original record.
What version of Koha are you running please?
Koha Version 3.05.00.008 Perl Version 5.010001 mysql Ver 14.14 Distrib 5.1.63, for debian-linux-gnu (x86_64) using readline 6.1 Server version: Apache/2.2.16 (Debian)
I get this error using Koha 3.08 how to solve this..? thank you.
Have a look to Bug 8586. Check if you have a mapping on 'biblioitems.biblioitemnumber'.
This is a fairly common support question, so I'm assuming it's not related to an actual bug. (Not that we might not be able to do better at catching the circumstances which cause this error).