diff --git a/backend/workflows/templates/workflows/developer_handbook.html b/backend/workflows/templates/workflows/developer_handbook.html
index afc41b1..18c32b4 100644
--- a/backend/workflows/templates/workflows/developer_handbook.html
+++ b/backend/workflows/templates/workflows/developer_handbook.html
@@ -673,6 +673,7 @@ lxc.mount.entry: /dev/null sys/module/apparmor/parameters/enabled none bind 0 0<
         <li><code>release/tubco-v1</code> is the frozen TUBCO customer branch.</li>
         <li>It should receive only approved bug fixes, security updates, and UI improvements.</li>
         <li>Do not deploy TUBCO from <code>develop</code> or <code>main</code>.</li>
+        <li>Keep TUBCO on the old customer database schema and review <code>docs/TUBCO_MAINTENANCE_POLICY.md</code> before backporting fixes.</li>
       </ul>
     </div>
     <div class="box">