If a field in MarcFieldsToOrder has two values price: 020$c When adding a staged file to a basket you get a 500 error and the logs say something like: ==> /var/log/koha/{site}/plack-error.log <== Invalid number of fields detected on field 020, please check this file at /usr/share/koha/lib/Koha/MarcOrder.pm line 294. We should find a way to handle this in the code, or at least provide meaningful feedback to the user