Hi Beda,

did this solve your problem?

If you reset the mappings local changes only made via the GUI to the Elasticsearch indexing configuration will be lost. Maybe you will want to keep a backup to compare settings later on.

Hope this helps,

Katrin

On 19.06.26 09:51, Fridolin SOMERS via Koha wrote:
Hi,

Rebuilding Elasticsearch index should fix the issue, it will first reset settings then recreate indexes.

https://git.koha-community.org/Koha-community/Koha/src/branch/main/debian/scripts/koha-elasticsearch#L33

Best regards,

Le 18/06/2026 à 18:08, David Nind via Koha a écrit :
This looks like Bug 42795
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=42795

David Nind
New Zealand

On Fri, 19 Jun 2026 at 03:42, Coehoorn, Joel via Koha <
[email protected]> wrote:

I've seen this as well.

*Joel Coehoorn*
Director of Information Technology
*York University*
Office: 402-363-5603 | [email protected] | york.edu



On Thu, Jun 18, 2026 at 7:58 AM Beda Szukics via Koha <
[email protected]> wrote:

Good afternoon


Upgrading from 25.11 to 26.05 one of my instancies blocks with:


Upgrade to 25.12.00.059 [10:13:58]: Bug 40658 - Ensure local-number is
sortable
  ERROR: Exception 'Koha::Exception' thrown 'Unable to update mappings for index "koha_mg_biblios". Reason was: "". Index needs to be recreated and
reindexed'

dpkg: Fehler beim Bearbeiten des Paketes koha-common (--configure):
  »installiertes post-installation-Skript des Paketes
koha-common«-Unterprozess gab den Fehlerwert 1 zurück


What can i do?


Greetings     Beda

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