Elastic Stack version 8.13.1 was released on April 2, 2024, addressing a critical bug found in version 8.10, which affected clusters with active or previously used downsampling configurations. This bug prevented clusters from upgrading to version 8.13.0, as Elasticsearch nodes on that version were unable to join the cluster due to an unversioned change in the wire format of DownsampleShardTaskParams persistent tasks. This change was part of an initiative to support unlimited dimensions per time-series index through TSID hashing, introduced in version 8.10. Users are encouraged to upgrade to version 8.13.1 to ensure a seamless experience and can find detailed information about the fixed issues and all changes in the release notes.