diff --git a/nixos/doc/manual/release-notes/rl-1709.xml b/nixos/doc/manual/release-notes/rl-1709.xml
index 5fba4c34ec8..7a92f2e8a63 100644
--- a/nixos/doc/manual/release-notes/rl-1709.xml
+++ b/nixos/doc/manual/release-notes/rl-1709.xml
@@ -39,6 +39,13 @@ following incompatible changes:</para>
       All JetBrains IDEs are now at <literal>jetbrains</literal>.
     </para>
   </listitem>
+  <listitem>
+    <para>
+      <literal>flexget</literal>'s state database cannot be upgraded to its
+      new internal format, requiring removal of any existing
+      <literal>db-config.sqlite</literal> which will be automatically recreated.
+    </para>
+  </listitem>
 </itemizedlist>