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

# Reconnect Sites with Security ID

> MainWP Child plugin version 5.2.1 enables the Unique Security ID feature by default. Learn how to reconnect child sites that require the Security ID by retrieving it from the Child plugin settings and updating your Dashboard.

Starting with MainWP Child plugin version 5.2.1, the Unique Security ID feature is enabled by default. This security enhancement requires entering the Security ID when connecting or reconnecting child sites.

## What You'll Learn

* Understand why the Security ID is required
* Retrieve the Security ID from a child site
* Enter the Security ID in your Dashboard
* Find the Security ID when the Child plugin is hidden

## Prerequisites

* MainWP Dashboard installed and activated
* MainWP Child plugin version 5.2.1 or later on child sites
* Admin access to both Dashboard and child sites

***

## Why This Happens

When connecting or reconnecting a child site with Security ID enabled, you'll see this error:

> This child site is set to require a unique security ID. Please enter it before the connection can be established.

<img src="https://mintcdn.com/mainwp/vt3GV9YSpiQ1gEJI/images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-8dd722.png?fit=max&auto=format&n=vt3GV9YSpiQ1gEJI&q=85&s=ac86abbcefddcb9be02ec20e47619f5a" alt="Error message indicating Unique Security ID is required for connection" width="1369" height="492" data-path="images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-8dd722.png" />

The Security ID is re-enabled automatically if:

* MainWP Child version 5.2.1 is installed fresh
* The Child plugin is deactivated and reactivated

<Note>
  This behavior is specific to version 5.2.1. Later versions may handle Security ID differently.
</Note>

***

## Reconnect Using the Security ID

<Steps>
  <Step title="Log in to the child site">
    Access the WordPress Admin of the child site showing the connection error.
  </Step>

  <Step title="Navigate to Child plugin settings">
    Go to **Settings > MainWP Child > Settings**.
  </Step>

  <Step title="Copy the Security ID">
    Locate the **Unique Security ID** field and copy its value.

    <img src="https://mintcdn.com/mainwp/vt3GV9YSpiQ1gEJI/images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-ac3f23.png?fit=max&auto=format&n=vt3GV9YSpiQ1gEJI&q=85&s=a3d5f37df44e93689f1788326e5217a9" alt="MainWP Child plugin settings showing the Unique Security ID field" width="1453" height="951" data-path="images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-ac3f23.png" />
  </Step>

  <Step title="Open site settings in Dashboard">
    Log in to your MainWP Dashboard and go to **MainWP > Sites > Manage Sites**. Find the child site and click **Edit**.
  </Step>

  <Step title="Paste the Security ID">
    Paste the copied Security ID into the **Unique Security ID** field.

    <img src="https://mintcdn.com/mainwp/vt3GV9YSpiQ1gEJI/images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-3791e3.png?fit=max&auto=format&n=vt3GV9YSpiQ1gEJI&q=85&s=7be1ae64005b8a441343ee7675956c38" alt="Dashboard Edit Site page showing the Security ID field" width="1477" height="917" data-path="images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-3791e3.png" />
  </Step>

  <Step title="Save settings">
    Scroll down and click **Save Settings**.
  </Step>

  <Step title="Reconnect the site">
    Click the **Reconnect** icon in the site's action menu.

    <img src="https://mintcdn.com/mainwp/vt3GV9YSpiQ1gEJI/images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-bbc119.png?fit=max&auto=format&n=vt3GV9YSpiQ1gEJI&q=85&s=d55ccb5ab2a4e80548280dff1e192d1a" alt="Reconnect button in the Manage Sites action menu" width="1488" height="502" data-path="images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-bbc119.png" />
  </Step>
</Steps>

***

## Find Security ID When Child Plugin is Hidden

If you're using the White Label extension to hide the MainWP Child plugin, the settings page won't be visible. Retrieve the Security ID directly from the WordPress options table.

<Steps>
  <Step title="Log in to the child site">
    Access the WordPress Admin of the child site.
  </Step>

  <Step title="Access the options page">
    Navigate to `your-child-site.com/wp-admin/options.php` in your browser.
  </Step>

  <Step title="Search for the Security ID">
    Use your browser's find feature (**Ctrl+F** or **Command+F**) to search for:

    ```text theme={null}
    mainwp_child_uniqueId
    ```
  </Step>

  <Step title="Copy the value">
    Copy the value from the `mainwp_child_uniqueId` field.

    <img src="https://mintcdn.com/mainwp/vt3GV9YSpiQ1gEJI/images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-128642.png?fit=max&auto=format&n=vt3GV9YSpiQ1gEJI&q=85&s=3c30632850da110c17c044f8df192d39" alt="Options.php page showing the mainwp_child_uniqueId field" width="967" height="141" data-path="images/miscellaneous/getting-started-child-plugin-5-2-1-reconnecting-child-sites-with-unique-security-id.mdx-128642.png" />
  </Step>

  <Step title="Complete reconnection">
    Return to your Dashboard and follow steps 4-7 above to paste the Security ID and reconnect.
  </Step>
</Steps>

***

## Self-Check Checklist

* [ ] Retrieved Security ID from child site settings (or options.php)
* [ ] Pasted Security ID into Dashboard site settings
* [ ] Saved Dashboard settings
* [ ] Successfully reconnected the child site
* [ ] Site syncs without errors

***

## Related Resources

* [Get Started with MainWP](/getting-started/get-started-with-mainwp) - Connect your first child site
* [Force Reconnection](/troubleshooting/how-can-i-force-my-mainwp-dashboard-to-reestablish-connection-with-child-sites) - Reconnect all sites
* [White Label Extension](/add-ons/agency/white-label-extension) - Hide the Child plugin