diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md
index 506af88d1..569f158cc 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/10.main/textbook.fr.md
@@ -242,19 +242,19 @@ remember to replace (auto-tra) with your initials (YYY).
 [EN] Independence of space and time 
 
 
-*CLAPTMEC-FU-010* : 
+*CLAPTMEC-FU-020* : 
 [ES] Un espacio euclidiano tridimensional 
 [FR] Un espace euclidien tridimensionnel
 [EN] A three-dimensional Euclidean space 
 
 
-*CLAPTMEC-FU-040* : 
+*CLAPTMEC-FU-030* : 
 [ES] transformación de Galileo
 [FR] transformation de Galilée
 [EN] Galileo's transformations
 
 
-*CLAPTMEC-FU-050* : 
+*CLAPTMEC-FU-040* : 
 [ES] teorema de la suma de velocidades
 [FR] théorème d'addition des vitesses
 [EN] theorem of addition of velocities