Hello, I’m currently upgrading our Elasticsearch cluster from version 8 to 9. During the process, I still had some old indices created with version 7. Using the Upgrade Assistant, I marked all the old 7.x indices as read-only via the API by setting the verified_read_only flag. After that, I procee…

Yes, the conversation was marked as spam, but it is working now. Thank you so much. The new index .async-search-reindexed-for-9 matches an existing legacy index template that applies to all indices (index_patterns: ["*"]). This legacy template conflicts with the creation of the new index, preventing…

Issues upgrading Elasticsearch from 8 to 9 due to old 7.x indices and restricted Kibana indices

Elastic Stack Elasticsearch

Tortoise June 12, 2025, 11:57am 2

Hello @axvfvv79zcx57xv7k

Please review below post where similar issue reported during upgrade :

Thanks!!

Topic		Replies	Views
Issues with upgrade from 8.18.1 to 9.0.1 Elasticsearch	28	900	June 10, 2025
Fleet indices prevent upgrade to Elasticsearch 9 Elasticsearch	3	142	June 10, 2025
Cannot upgrade to 8.x; cannot find incompatible indices Elasticsearch	4	1618	May 5, 2022
Pre migration step "Migrate system indices" failed Elasticsearch migration	3	445	June 11, 2024
Problem with upgrading to 9.0.0, index compability Elasticsearch	7	528	May 19, 2025

Issues upgrading Elasticsearch from 8 to 9 due to old 7.x indices and restricted Kibana indices

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