> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fusion AI 4.2.6 Release Notes

[localhost link]: http://localhost:3000/docs/4/fusion-ai/release-notes/4.2.6-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/4/fusion-ai/release-notes/4.2.6-release-notes

[old doc.lw link]: https://doc.lucidworks.com/fusion-ai/4.2/434

**Release date:** 31 March 2020

**Component versions:**

|            |                  |             |                        |              |
| ---------- | ---------------- | ----------- | ---------------------- | ------------ |
| Solr 7.7.2 | ZooKeeper 3.4.13 | Spark 2.3.2 | Jetty 9.4.19.v20190610 | Ignite 2.6.0 |

**More information about support dates can be found at [Lucidworks Fusion Product Lifecycle](/docs/policies/lifecycle-policies/lw-fusion-product-lifecycle).**

## New features

* Support is added for individually selecting multiple rules to publish in the Fusion UI:

  <img src="https://mintcdn.com/lucidworks/hRHvA40l_Bej4D7e/assets/images/5.1/release-notes/publish-indiv-rules.png?fit=max&auto=format&n=hRHvA40l_Bej4D7e&q=85&s=ba75e8167c2b3fc9f89da2a214d2ba8d" alt="Individually publish rules in the Fusion UI" width="883" height="369" data-path="assets/images/5.1/release-notes/publish-indiv-rules.png" />

## Improvements

* Fields in the Business Rules edit modal now flex to show more information when the panel is expanded.

## Bug fixes

* Fixed a bug that caused [head/tail analysis jobs](/docs/4/fusion-ai/reference/jobs/head-tail-analysis) to overwrite published rules.
* Fixed a bug in the Rules Editor that prevented more than 20 rules from being deleted at once.
* Fixed a bug in the Rules Editor that sometimes caused UI instability when adding a synonym to an existing rule.