diff --git a/12.temporary_ins/10.electrostatics-vacuum/30.gauss-theorem-demonstration/20.overview/cheatsheet.fr.md b/12.temporary_ins/10.electrostatics-vacuum/30.gauss-theorem-demonstration/20.overview/cheatsheet.fr.md
index e05507d17..3b5a83a2c 100644
--- a/12.temporary_ins/10.electrostatics-vacuum/30.gauss-theorem-demonstration/20.overview/cheatsheet.fr.md
+++ b/12.temporary_ins/10.electrostatics-vacuum/30.gauss-theorem-demonstration/20.overview/cheatsheet.fr.md
@@ -3,12 +3,10 @@ title: Démonstration du théorème de Gauss
 published: true
 routable: false
 visible: false
----
-<!--
 lessons:
     - slug: gauss-ampere-theorems-demonstration
       order: 1
-      -->
+---
 
 <!--caligraphie de l'intégrale double curviligne-->
 $`\def\oiint{\displaystyle\mathop{{\iint}\mkern-18mu \scriptsize \bigcirc}}`$