Created attachment 189367 [details] 773$w generated data: 003+001 Bug 39545 improved data population from the Parent serial record into the 773 field when a new child record was created. Some of this data is not needed for some libraries, some is in a format that does not work. Can this be a feature that can be fully turned off using a SysPref? A more specific request: Whether intentional or not with that enhancement, the 773$w field is populated not only with the 001 of the parent record, but also with the 003. The 003 (an alphabetical code) messes up the export of the 773$w data via OAI-PMH, as only a number (001) is expected, and throws errors. Can we use a SysPref to decide which exact parent fields will populate in each 773 child field? Or at least remove the 003 from the 773$w right now?