diff --git a/src/helper/migrate.php b/src/helper/migrate.php
index 3a50936..b57d956 100644
--- a/src/helper/migrate.php
+++ b/src/helper/migrate.php
@@ -251,6 +251,36 @@ use Joomla\CMS\Log\Log;
         $log('Update server redirect failed: ' . $e->getMessage(), Log::WARNING);
     }
 
+    // Unlock MokoCassiopeia (allow uninstall) + lock MokoOnyx (prevent accidental uninstall)
+    try {
+        $query = $db->getQuery(true)
+            ->update('#__extensions')
+            ->set($db->quoteName('locked') . ' = 0')
+            ->set($db->quoteName('protected') . ' = 0')
+            ->where($db->quoteName('element') . ' = ' . $db->quote($oldName))
+            ->where($db->quoteName('type') . ' = ' . $db->quote('template'));
+        $db->setQuery($query)->execute();
+        if ($db->getAffectedRows() > 0) {
+            $log('Unlocked MokoCassiopeia (can be uninstalled).');
+        }
+    } catch (\Throwable $e) {
+        $log('Failed to unlock MokoCassiopeia: ' . $e->getMessage(), Log::WARNING);
+    }
+
+    try {
+        $query = $db->getQuery(true)
+            ->update('#__extensions')
+            ->set($db->quoteName('locked') . ' = 1')
+            ->where($db->quoteName('element') . ' = ' . $db->quote($newName))
+            ->where($db->quoteName('type') . ' = ' . $db->quote('template'));
+        $db->setQuery($query)->execute();
+        if ($db->getAffectedRows() > 0) {
+            $log('Locked MokoOnyx (protected from uninstall).');
+        }
+    } catch (\Throwable $e) {
+        $log('Failed to lock MokoOnyx: ' . $e->getMessage(), Log::WARNING);
+    }
+
     // Write marker file
     @file_put_contents($markerFile, date('Y-m-d H:i:s') . " migrated {$oldName} → {$newName}");