[Koha] How to link authority data via existing number?

[Michael Kuhn]

Hi

In our library we are migrating from our current system to Koha 21.11.

We have migrated existing authority data and created for example

Title data record
* MARC 100$9 STA101744
* MARC 100$a Lansky, Ralph

Authority data record (PERSO_NAME)
* MARC 001 STA101744
* MARC 100$a Lansky, Ralph

Both kinds of records were successully loaded, after that we tried to 
link these records using script "link_bibs_to_authorities.pl" but it 
failed. We expected this would create a link between title record and 
authority record via number STA101744 but instead the content of MARC 
001 of the authority record was surprisingly replaced by a new number 
and it linked only to one title record that didn't have content in MARC 
100$9 but did contain (another) "Lansky, Ralph" in MARC 100$a. While the 
actual records containing MARC 100$9 STA101744 were not linked to the 
authority record and seem to have been ignored.

How can we successfully link title data records via existing numbers in 
MARC 001 of the authority record?

Best wishes: Michael
-- 
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