Bug 5683 (link_bibs_to_authorities.pl can corrupt records) was signed off some months ago, but is perhaps a little too cryptic for me to follow in detail. Can someone help? As far as I can see, without remedial action, this is catastrophic. Following difficulties we have had migrating 3.2 to 3.6.1, someone on the users mailing list suggested we should run link_bibs_to_authorities.pl -- (db has ~10k authorities and ~15k biblios) -- so I did just that, and have APPARENTLY DEMOLISHED *EVERY* LINK IN THE DB. From my notes: paul@nelson:/usr/share/koha$ ./bin/link_bibs_to_authorities.pl Bib authority heading linking report ------------------------------------ Number of bibs checked: 14911 Number of bibs modified: 14886 Number of bibs with errors: 0 but - the staff interface no longer correctly finds authorities !!! [1] Manually link (staff client) auth "Lubbock" to bib "Arctic Whalers" -- now linked, 35 other Lubbock bibs not linked. Is this a question of zebra re-indexing? So: KOHA_CONF=/etc/koha/koha-conf.xml PERL5LIB=/usr/share/koha/lib ./bin/migration_tools/rebuild_zebra.pl -a -r -v and KOHA_CONF=/etc/koha/koha-conf.xml PERL5LIB=/usr/share/koha/lib ./bin/migration_tools/rebuild_zebra.pl -b -r -v -x koha@nelson:/usr/share/koha$ ./bin/link_bibs_to_authorities.pl ... processed 100 records / ... / ... processed 14900 records Bib authority heading linking report ------------------------------------ Number of bibs checked: 14911 Number of bibs modified: 1 Number of bibs with errors: 0 koha@nelson:/usr/share/koha$ All this did was to *un-link" the bib/auth link that I had manually entered at [1] above. Could someone involved with signing off bug 5683 please explain why link==unlink? Help - please. Paul