> ## 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 5.1.4 Release Notes (LTS)

> Security patches, performance optimizations, 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 **security patches**, **performance optimizations**, **bug fixes**, and **stability improvements**. Upgrades from **5.1.3 → 5.1.4** are non-breaking and fully compatible.
</Info>

<Card title="Release Highlight" icon="star" iconType="duotone">
  **Maintenance Release**: FlowX.AI 5.1.4 delivers security patches and stability improvements:

  * Numerous bug fixes addressing reported and internally identified issues
  * Improvements and enhancements to various platform components
  * Platform tasks focused on infrastructure and overall stability
  * No breaking changes — fully compatible upgrade from 5.1.3
</Card>

***

**What's new? 🆕**

<Tabs>
  <Tab title="Highlights">
    FlowX.AI 5.1.4 delivers comprehensive security, performance, and stability improvements across the platform.

    🐛 [**Bug Fixes**](#bug-fixes) — Customer-reported and proactive fixes across platform components and stability improvements\
    ⚡ [**Platform Improvements**](#platform-improvements) — Infrastructure hardening and dependency updates

    ***

    ### **Bug Fixes**

    <Card title="Bug Fixes" icon="bug" iconType="duotone">
      <Tabs>
        <Tab title="Customer fixes">
          Issues resolved based on customer feedback:

          <Accordion title="Form validators do not work inside collection prototypes">
            **Summary:**

            Validators applied to forms within collection prototypes are not triggered as expected.
          </Accordion>

          <Accordion title="Project editor could modify access permissions">
            **Summary:**

            Project editors were incorrectly able to modify project access permissions and delete projects. This has been fixed: `project_editor` can no longer modify access management or delete projects/libraries. Only `project_owner` and `workspace_admin` can change project ownership, add/remove users and groups from projects/libraries, and delete projects/libraries.
          </Accordion>

          <Accordion title="Subprocess UI still shown after subprocess is finished">
            **Summary:**

            In processes with multiple subprocesses that have UI, the first subprocess UI remained visible after completion until the next user task details were received. The UI now correctly clears when a subprocess finishes.
          </Accordion>
        </Tab>
      </Tabs>
    </Card>

    ***

    ### **Platform Improvements**

    <Card title="Platform Improvements" icon="server" iconType="duotone">
      <Tabs>
        <Tab title="Infrastructure">
          <CardGroup cols={2}>
            <Card title="Kafka environment variables alignment" icon="server">
              Kafka environment variables are now consistent across all services with backwards compatibility support for existing configurations.
            </Card>

            <Card title="Config params cache improvements" icon="server">
              New environment variables for tuning config params cache: `FLOWX_CACHE_CONFIGPARAMS_TTLSECONDS` and `FLOWX_CACHE_CONFIGPARAMS_MAXENTRIES`. See [Engine Setup](/5.1/setup-guides/flowx-engine-setup-guide/engine-setup#config-params-cache).
            </Card>

            <Card title="Project editor permissions update" icon="shield-halved">
              `project_editor` can no longer delete projects or modify access permissions. `projects_admin` permission now grants full project management capabilities. See [Roles Permissions Matrix](/5.1/setup-guides/access-management/roles-permissions-matrix).
            </Card>

            <Card title="Advancing partition counter fix" icon="gauge-high">
              Fixed an issue where the advancing partition counter could go negative, causing event processing failures. Improves reliability in integration-designer and process-engine.
            </Card>
          </CardGroup>
        </Tab>
      </Tabs>
    </Card>

    ***
  </Tab>

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

    <Info>
      **Upgrade Compatibility**: FlowX.AI 5.1.4 is fully compatible with 5.1.3. 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 5.1.3 → 5.1.4 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 v5.1.4](./deployment-guidelines-v5.1.4).

    ### 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
    * Additional renderer enhancements
  </Tab>
</Tabs>