Stop matching records with 020 subfield z
As part of a matching process Primo checks the 020 subfield z, which in MARC format is used for Canceled/invalid ISBN, to display two records as related. That means Primo shows the holdings of the "related" record in the full display of the first record. For a user the holdings will be on the record with invalid ISBN. Very confusing. We've been adviced to delete the ISBN in 020 z or move it to 776, which is a very bad solution. I advice ExLibris to get rid of this solution and not violate the standards of MARC.