diff --git a/.mokogitea/manifest.xml b/.mokogitea/manifest.xml
index 1dcd58b..8891b59 100644
--- a/.mokogitea/manifest.xml
+++ b/.mokogitea/manifest.xml
@@ -9,7 +9,7 @@
     <display-name>Template - MokoOnyx</display-name>
     <org>MokoConsulting</org>
     <description>MokoOnyx - Joomla site template (successor to MokoCassiopeia)</description>
-    <version>02.19.00</version>
+    <version>02.19.02</version>
     <license spdx="GPL-3.0-or-later">GNU General Public License v3</license>
   </identity>
   <governance>
diff --git a/.mokogitea/workflows/issue-branch.yml b/.mokogitea/workflows/issue-branch.yml
index 6958f88..f450d94 100644
--- a/.mokogitea/workflows/issue-branch.yml
+++ b/.mokogitea/workflows/issue-branch.yml
@@ -5,7 +5,7 @@
 # FILE INFORMATION
 # DEFGROUP: Gitea.Workflow
 # INGROUP: moko-platform.Automation
-# VERSION: 02.19.00
+# VERSION: 02.19.02
 # BRIEF: Auto-create feature branch when an issue is opened
 
 name: "Universal: Issue Branch"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c73908..6226b5b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,11 +8,11 @@
  DEFGROUP: Joomla.Template.Site
  INGROUP: MokoOnyx.Documentation
  PATH: ./CHANGELOG.md
- VERSION: 02.19.00
+ VERSION: 02.19.02
  BRIEF: Changelog file documenting version history of MokoOnyx
  -->
 
-# Changelog — MokoOnyx (VERSION: 02.19.00)
+# Changelog — MokoOnyx (VERSION: 02.19.02)
 ## [Unreleased]
 
 ## [02.19.00] --- 2026-06-04
diff --git a/SECURITY.md b/SECURITY.md
index 28608f9..d707c57 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -10,7 +10,7 @@
  INGROUP: MokoOnyx.Governance
  REPO: https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx
  FILE: SECURITY.md
- VERSION: 02.19.00
+ VERSION: 02.19.02
  BRIEF: Security policy and vulnerability reporting process for MokoOnyx.
  PATH: /SECURITY.md
  NOTE: This policy is process oriented and does not replace secure engineering practices.
diff --git a/src/html/layouts/joomla/module/card.php b/src/html/layouts/joomla/module/card.php
index 42e39a4..807b96b 100644
--- a/src/html/layouts/joomla/module/card.php
+++ b/src/html/layouts/joomla/module/card.php
@@ -10,7 +10,7 @@
  * INGROUP: MokoOnyx
  * REPO: https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx
  * PATH: /html/layouts/joomla/module/card.php
- * VERSION: 02.19.00
+ * VERSION: 02.19.02
  * BRIEF: Custom card module chrome — renders module titles for all modules
  */
 
diff --git a/src/html/layouts/mokoonyx/article-metadata.php b/src/html/layouts/mokoonyx/article-metadata.php
index ce119e9..2e21eee 100644
--- a/src/html/layouts/mokoonyx/article-metadata.php
+++ b/src/html/layouts/mokoonyx/article-metadata.php
@@ -11,7 +11,7 @@
  * INGROUP: MokoOnyx.Layouts
  * REPO: https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx
  * PATH: /src/html/layouts/mokoonyx/article-metadata.php
- * VERSION: 02.19.00
+ * VERSION: 02.19.02
  * BRIEF: Article metadata footer layout -- renders jcfields grouped by field group
  */
 
diff --git a/src/media/css/a11y-high-contrast.css b/src/media/css/a11y-high-contrast.css
index 3dd2da1..a7a5503 100644
--- a/src/media/css/a11y-high-contrast.css
+++ b/src/media/css/a11y-high-contrast.css
@@ -10,7 +10,7 @@
  * INGROUP: MokoOnyx.Accessibility
  * REPO: https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx
  * PATH: ./media/css/a11y-high-contrast.css
- * VERSION: 02.19.00
+ * VERSION: 02.19.02
  * BRIEF: High-contrast stylesheet for accessibility toolbar
  */
 
diff --git a/src/script.php b/src/script.php
index c48027e..35f6641 100644
--- a/src/script.php
+++ b/src/script.php
@@ -94,6 +94,7 @@ class Tpl_MokoonyxInstallerScript implements InstallerScriptInterface
             $this->clearFaviconStamp();
             $this->cleanMediaFolder();
             $this->removeDeletedFiles();
+            $this->removeDuplicateExtensions();
             $this->lockExtension();
         }
 
@@ -484,6 +485,96 @@ class Tpl_MokoonyxInstallerScript implements InstallerScriptInterface
         }
     }
 
+    /**
+     * Remove duplicate MokoOnyx extension entries from #__extensions.
+     *
+     * Re-installs or migrations can leave ghost rows.  We keep the one
+     * that is locked (the active template) and delete any extras.
+     * Also removes stale MokoCassiopeia entries if present.
+     */
+    private function removeDuplicateExtensions(): void
+    {
+        $db = Factory::getDbo();
+
+        // Find all MokoOnyx template entries
+        $rows = $db->setQuery(
+            $db->getQuery(true)
+                ->select(['extension_id', 'locked'])
+                ->from('#__extensions')
+                ->where($db->quoteName('element') . ' = ' . $db->quote(self::NEW_NAME))
+                ->where($db->quoteName('type') . ' = ' . $db->quote('template'))
+                ->order('locked DESC, extension_id ASC')
+        )->loadObjectList();
+
+        if (count($rows) > 1) {
+            $keep = (int) $rows[0]->extension_id;
+            $removed = 0;
+
+            for ($i = 1; $i < count($rows); $i++) {
+                $staleId = (int) $rows[$i]->extension_id;
+
+                $db->setQuery(
+                    $db->getQuery(true)
+                        ->delete('#__update_sites_extensions')
+                        ->where('extension_id = ' . $staleId)
+                )->execute();
+
+                $db->setQuery(
+                    $db->getQuery(true)
+                        ->delete('#__extensions')
+                        ->where('extension_id = ' . $staleId)
+                )->execute();
+
+                $removed++;
+            }
+
+            if ($removed > 0) {
+                $this->logMessage("Removed {$removed} duplicate MokoOnyx extension(s). Kept ID {$keep}.");
+            }
+        }
+
+        // Remove stale MokoCassiopeia if not set as default
+        $oldExt = (int) $db->setQuery(
+            $db->getQuery(true)
+                ->select('extension_id')
+                ->from('#__extensions')
+                ->where($db->quoteName('element') . ' = ' . $db->quote(self::OLD_NAME))
+                ->where($db->quoteName('type') . ' = ' . $db->quote('template'))
+        )->loadResult();
+
+        if ($oldExt) {
+            $isDefault = (int) $db->setQuery(
+                $db->getQuery(true)
+                    ->select('COUNT(*)')
+                    ->from('#__template_styles')
+                    ->where($db->quoteName('template') . ' = ' . $db->quote(self::OLD_NAME))
+                    ->where($db->quoteName('home') . ' = 1')
+            )->loadResult();
+
+            if ($isDefault === 0) {
+                $db->setQuery(
+                    $db->getQuery(true)
+                        ->delete('#__update_sites_extensions')
+                        ->where('extension_id = ' . $oldExt)
+                )->execute();
+
+                $db->setQuery(
+                    $db->getQuery(true)
+                        ->delete('#__extensions')
+                        ->where('extension_id = ' . $oldExt)
+                )->execute();
+
+                $db->setQuery(
+                    $db->getQuery(true)
+                        ->delete('#__template_styles')
+                        ->where($db->quoteName('template') . ' = ' . $db->quote(self::OLD_NAME))
+                )->execute();
+
+                $this->logMessage('Removed stale MokoCassiopeia extension and styles.');
+            }
+        }
+    }
+
     /**
      * Remove files and directories that were shipped in previous versions
      * but have since been deleted from the package.
diff --git a/src/templateDetails.xml b/src/templateDetails.xml
index e905250..02d4690 100644
--- a/src/templateDetails.xml
+++ b/src/templateDetails.xml
@@ -32,11 +32,11 @@
 <extension type="template" client="site" method="upgrade">
 	<updateservers>
 		<server type="extension" priority="1" name="MokoOnyx Update Server (MokoGitea)">
-			https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/raw/branch/main/updates.xml
+			https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/updates.xml
 		</server>
 	</updateservers>
 	<name>mokoonyx</name>
-	<version>02.19.00</version>
+	<version>02.19.02-dev</version>
 	<scriptfile>script.php</scriptfile>
 	<creationDate>2026-05-16</creationDate>
 	<author>Jonathan Miller || Moko Consulting</author>
diff --git a/updates.xml b/updates.xml
index f7ef071..8d493ff 100644
--- a/updates.xml
+++ b/updates.xml
@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
  SPDX-License-Identifier: GPL-3.0-or-later
- VERSION: 02.18.04-dev
+ VERSION: 02.19.02-dev
  -->
 
 <updates>
@@ -11,13 +11,13 @@
     <element>mokoonyx</element>
     <type>template</type>
     <client>site</client>
-    <version>02.18.04-dev</version>
+    <version>02.19.02-dev</version>
     <creationDate>2026-06-04</creationDate>
     <infourl title='Template - MokoOnyx'>https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/releases/tag/development</infourl>
     <downloads>
-      <downloadurl type='full' format='zip'>https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/releases/download/development/tpl_mokoonyx-02.18.04-dev.zip</downloadurl>
+      <downloadurl type='full' format='zip'>https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/releases/download/development/tpl_mokoonyx-02.19.02-dev.zip</downloadurl>
     </downloads>
-    <sha256>32e888ba865ab28a96afe1a1f76380c4a3b341389f730e9c6899bdcac9b2bd36</sha256>
+    <sha256>5811cc175564744865053f5a2cf259e66016c4e41f2d87571d19b1dd5f7fd8ba</sha256>
     <tags><tag>dev</tag></tags>
     <changelogurl>https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/raw/branch/main/CHANGELOG.md</changelogurl>
     <maintainer>Moko Consulting</maintainer>