diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/05.first-steps/textbook.es.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/05.first-steps/textbook.es.md
index 26e4a0a2e..ada14c445 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/05.first-steps/textbook.es.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/05.first-steps/textbook.es.md
@@ -3,7 +3,6 @@ title: Lluvia de ideas para estructurar un tema de "Electromagnetismo"
 published: true
 routable: true
 visible: false
-lessons:
 lessons:
     - slug: brainstorming-g12-electromagnetism
       order: 1