diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/electromagnetism/n4/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/electromagnetism/n4/textbook.en.md
index 8bf3da9a7..fa64f30e7 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/electromagnetism/n4/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/electromagnetism/n4/textbook.en.md
@@ -4,8 +4,8 @@ published: true
 routable: true
 visible: false
 lessons:
-    - slug: brainstorming-n1234-electromagnetism
-      order: 4
+    - slug: brainstorming-234-electromagnetism
+      order: 3
 ---
 
 #### Brainstorming to structure a theme "Electromagnetism" : level 4