https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=19707 --- Comment #2 from David Gustafsson <glasklas@gmail.com> --- "add": Only new fields will be added (present in mappings.yaml but not in database), mappings for fields stored in database will be left untouched. "revert": Mappings for all fields in mappings.yaml will be reverted, mappings restored to default onces, and local modifications of those mappings removed. "merge": New mappings for fields present in mappings.yaml will be merged in, keeping any local modifications of marc targets (this could also include old problematic mappings later fixed in mappings.yaml, so should be used with some caution). -- You are receiving this mail because: You are the assignee for the bug. You are watching all bug changes.