diff --git a/docs/1.9/404.html b/docs/1.9/404.html
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+++ b/docs/1.9/404.html
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+<!DOCTYPE html>
+<html lang="1.9" class="js csstransforms3d">
+
+<head>
+  <meta charset="utf-8"> <meta name="description" content="A set of micro-services for connecting millions of devices.">
+<meta name="author" content="The Eclipse Hono Project">
+ <link rel="apple-touch-icon" sizes="180x180" href="/hono/docs/favicon/apple-touch-icon.png">
+<link rel="icon" type="image/png" sizes="48x48" href="/hono/docs/favicon/favicon-48x48.png">
+<link rel="icon" type="image/png" sizes="32x32" href="/hono/docs/favicon/favicon-32x32.png">
+<link rel="icon" type="image/png" sizes="16x16" href="/hono/docs/favicon/favicon-16x16.png">
+<link rel="manifest" href="/hono/docs/favicon/site.webmanifest">
+<link rel="mask-icon" href="/hono/docs/favicon/safari-pinned-tab.svg" color="#5bbad5">
+<link rel="shortcut icon" href="/hono/docs/favicon/favicon.ico">
+<meta name="msapplication-TileColor" content="#da532c">
+<meta name="msapplication-config" content="/hono/docs/favicon/browserconfig.xml">
+<meta name="theme-color" content="#ffffff">
+ 
+  <title>404 Page not found</title>
+
+   
+    <link href="/hono/docs/css/nucleus.css?1626225095" rel="stylesheet">
+    <link href="/hono/docs/css/fontawesome-all.min.css?1626225095" rel="stylesheet">
+    <link href="/hono/docs/css/hybrid.css?1626225095" rel="stylesheet">
+    <link href="/hono/docs/css/featherlight.min.css?1626225095" rel="stylesheet">
+    <link href="/hono/docs/css/perfect-scrollbar.min.css?1626225095" rel="stylesheet">
+    <link href="/hono/docs/css/theme.css?1626225095" rel="stylesheet">
+    <link href="/hono/docs/css/hugo-theme.css?1626225095" rel="stylesheet">
+    
+      <link href="/hono/docs/css/theme-hono.css?1626225095" rel="stylesheet">
+    
+<style>
+    :root #header + #content > #left > #rlblock_left {
+      display: none !important;
+    }
+
+    p,
+    li,
+    ul {
+      text-align: center
+    }
+
+    ul {
+      list-style-type: none;
+    }
+</style>
+
+<link rel="stylesheet" href="https://www.eclipse.org/eclipse.org-common/themes/solstice/public/stylesheets/vendor/cookieconsent/cookieconsent.min.css">
+
+
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:site" content="@EclipseHono">
+<meta name="twitter:title" content="404 Page not found :: Eclipse Hono&amp;trade; Vers.: 1.9">
+<meta name="twitter:image" content="https://www.eclipse.org/hono/docs/images/twitter_image.png">
+<meta name="twitter:description" content="A set of micro-services for connecting millions of devices.">
+
+
+<meta property="og:title" content="404 Page not found :: Eclipse Hono&amp;trade; Vers.: 1.9" />
+<meta property="og:type" content="website" />
+<meta property="og:url" content="https://www.eclipse.org/hono/docs/1.9/404.html/" />
+<meta property="og:image" content="https://www.eclipse.org/hono/docs/images/twitter_image.png" />
+
+</head>
+
+  <body class="" data-url="/">
+
+    <section id="body" style="margin-left:0px;">
+      <div id="overlay"></div>
+      <div id="chapter">
+        <div id="body-inner">
+          <h1>Error</h1>
+          <p>
+          </p>
+          <p>Woops. Looks like this page doesn&#39;t exist ¯\_(ツ)_/¯.</p>
+          <p></p>
+          <p><a href='/hono/docs/1.9/'>Go to homepage</a></p>
+          <p><img src='/hono/docs/images/gopher-404.jpg' style="width:50%" alt="Page not found!"></p>
+        </div>
+      </div>
+
+    </section>
+  </body>
+
+</html>