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

# FlowX.AI 5.1.13 Release Notes (LTS)

> Bug fixes and stability improvements for the FlowX.AI 5.1.x LTS line.

<Info>
  This is a **Long-Term Support (LTS)** maintenance release focusing on **bug fixes** and **security patches**. Upgrades from **5.1.12 → 5.1.13** are non-breaking and fully compatible.
</Info>

<Card title="Release Highlight" icon="star" iconType="duotone">
  **Maintenance release.** FlowX.AI 5.1.13 includes reliability fixes for process advancing, a process designer fix, and security patches:

  * Process advancing fixes that prevent lost or stalled process advances under load
  * Action deletion fix for business rules that call reusable functions
  * Security patches and dependency upgrades across platform components
  * No breaking changes; fully compatible upgrade from 5.1.12
</Card>

***

**What's new? 🆕**

<Tabs>
  <Tab title="Highlights">
    Bug fixes and security patches across the platform.

    🔧 [**Platform Improvements**](#platform-improvements) - Process advancing reliability fixes, a process designer fix, and security patches

    ***

    ### **Platform Improvements**

    <Card title="Platform Improvements" icon="wrench" iconType="duotone">
      <Tabs>
        <Tab title="Bug fixes">
          <Accordion title="Notable bug fixes">
            * **Process advancing:** the partition cleanup job no longer deletes advance events that are accepted while cleanup is running. Event insertion and cleanup now coordinate through database row locks, on both PostgreSQL and Oracle, so a process advance can no longer be lost to a concurrent cleanup.&#x20;
            * **Process advancing:** advancing workers no longer pause for cooldown while work is still queued, and event completion is retried after a database deadlock instead of leaving an already-processed event marked as in progress.&#x20;
            * **Process designer:** deleting an action no longer fails with a server error when one of its business rules calls a reusable function.&#x20;
          </Accordion>
        </Tab>

        <Tab title="Other improvements">
          <Accordion title="Security patches">
            This release includes security patches and dependency upgrades across platform components. The Java runtime base images move to Eclipse Temurin 21.0.12 with a refreshed OS package layer.&#x20;
          </Accordion>
        </Tab>
      </Tabs>
    </Card>

    ***
  </Tab>

  <Tab title="Info">
    ## Additional information

    <Info>
      **Upgrade Compatibility**: FlowX.AI 5.1.13 is fully compatible with 5.1.12. No configuration changes, schema migrations, or data transformations are required.
    </Info>

    ### Compatibility

    <CardGroup cols={2}>
      <Card title="Upgrade Path" icon="arrow-up-right-dots">
        Direct upgrade from 5.1.12 → 5.1.13 with no breaking changes or configuration updates
      </Card>

      <Card title="Component Compatibility" icon="circle-check">
        Compatible with FlowX.AI SDKs (Angular/React/iOS/Android), Designer, and Database 5.1.x
      </Card>
    </CardGroup>

    ### Deployment information

    <Info>
      Standard deployment procedures apply. No special migration steps required for this maintenance release.
    </Info>

    For detailed deployment guidelines, see [Deployment Guidelines v5.1.13](./deployment-guidelines-v5.1.13).

    ### What's next

    **FlowX.AI 5.1.x LTS** will continue to receive maintenance updates focused on:

    * Security patches and vulnerability fixes
    * Stability improvements and bug fixes
    * Performance optimizations
  </Tab>
</Tabs>


## Related topics

- [FlowX.AI 5.1.5 Release Notes (LTS)](/release-notes/v5.x/v5.1.x-lts/v5.1.5-february-2026.md)
- [FlowX.AI 5.1.7 Release Notes (LTS)](/release-notes/v5.x/v5.1.x-lts/v5.1.7-march-2026.md)
- [FlowX.AI 5.1.8 Release Notes (LTS)](/release-notes/v5.x/v5.1.x-lts/v5.1.8-april-2026.md)
- [FlowX.AI 5.1.9 Release Notes (LTS)](/release-notes/v5.x/v5.1.x-lts/v5.1.9-may-2026.md)
- [FlowX.AI 5.1.1 Release Notes (LTS)](/release-notes/v5.x/v5.1.x-lts/v5.1.1-november-2025.md)