diff --git a/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/10.main/textbook.fr.md b/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/10.main/textbook.fr.md
index 86774f669..9d70f5b4d 100644
--- a/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/10.main/textbook.fr.md
+++ b/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/10.main/textbook.fr.md
@@ -4,8 +4,6 @@ published: true
 routable: false
 visible: false
 lessons:
-    - slug: 
-      order:  
     - slug: spherical-coordinates-linear
       order: 1 
 ---