[Koha-bugs] [Bug 34739] New: Linked biblios should not be merged (updated) when changes to an authority don't change the authorized heading

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=34739

            Bug ID: 34739
           Summary: Linked biblios should not be merged (updated) when
                    changes to an authority don't change the authorized
                    heading
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: MARC Authority data support
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: nick at bywatersolutions.com
        QA Contact: testopia at bugs.koha-community.org

If an authority record is modified in any way, we trigger a merge to update all
biblios using the authority.

This also happens if we merge a duplciate authority into one that is in use,
all biblios already attached to the correct authority are updated.

If the heading or controlled indicators or thesaurus have changed, this makes
sense, but if not, we are triggering many biblio modifications and reindexes
that are not needed.

We also need to consider the case where a See-From is is added and
IncludeSeeFromInSearches is enabled

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