IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Reindex before upgrading
editReindex before upgrading
editBefore upgrading to Elasticsearch 8.0 and later, you must reindex any indices created in a 6.x version. We recommend using the Upgrade Assistant to guide you through this process.
For more information about upgrading, refer to Upgrading to Elastic 8.15.5.
For more information about reindexing, refer to Reindex.