Bar codes, patron ID numbers and 001 - CONTROL NUMBER all have to be unique. I am not sure which ID number the warning is for, but check those numbers for duplicates. Does it happen with every item you check out or just the one?
Elaine Bradtke VWML English Folk Dance and Song Society | http://www.efdss.org Cecil Sharp House, 2 Regent's Park Road, London NW1 7AY Tel +44 (0) 20 7485 2206 (This number is for the English Folk Dance and Song Society in London, England. If you wish to phone me personally, send an e-mail first. I work off site) -------------------------------------------------------------------------- Registered Company No. 297142 Charity Registered in England and Wales No. 305999 On Fri, Nov 15, 2019 at 9:27 AM Davide Spanu <[email protected]> wrote: > Good evening, > > we are starting to use the koha catalog for loans and we realized that when > checking out of the copy after booking, when entering the copy code, the > system generates this error: > > > > > Software error: > > Duplicate ID > > For help, please send mail to the webmaster, giving this error message and > the time and date of the error. > > > > > > Is there a way to correct this problem? > > _______________________________________________ > Koha mailing list http://koha-community.org > [email protected] > https://lists.katipo.co.nz/mailman/listinfo/koha > _______________________________________________ Koha mailing list http://koha-community.org [email protected] https://lists.katipo.co.nz/mailman/listinfo/koha

