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Elasticsearch version 8.8.1

Also see Breaking changes in 8.8.

Bug fixes

Data streams

Allow the removal of an in-use template if there are other ones matching the dependent data streams #96286

Geo

API rest compatibility for type parameter in geo_bounding_box query #96317

Rollup

Do not copy index.default_pipeline and index.final_pipeline #96494 (issue: #96478)

TSDB

Expand start and end time to nanoseconds during coordinator rewrite when needed #96035 (issue: #96030)
Fix NPE when indexing a document that just has been deleted in a tsdb index #96461

Transform

Improve error message on transform _update conflict #96432
Report version conflict on concurrent updates #96293 (issue: #96311)

Enhancements

Query Languages

Reduce nesting of same bool queries #96265 (issue: #96236)

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https://www.elastic.co/guide/en/elasticsearch/reference/8.17/release-notes-8.8.1.html