https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=43029 --- Comment #9 from Nick Clemens (kidclamp) <nick@bywatersolutions.com> --- Invalid characters and empty subfields both work fine, to see this effect you have to truly break a record, and that's easy enough: UPDATE biblio_metadata SET metadata = REPLACE(metadata, '</record>', '<datafield tag="500" ind1=" " ind2=" "></datafield><datafield tag="501" ind1=" " ind2=" "><subfield code="a">This &anp; that</subfield></datafield></record>') WHERE biblionumber =228; Note that that breakage prevents you from loading the record in the staff interface - we probably need to build in a protection for this into the cleaning routine -- You are receiving this mail because: You are watching all bug changes.