diff --git a/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.es.md b/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.es.md
index b50ea2bab..5521d1187 100644
--- a/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.es.md
+++ b/12.temporary_ins/65.geometrical-optics/50.simple-elements/20.mirror/20.overview/cheatsheet.es.md
@@ -4,8 +4,8 @@ published: true
 routable: true
 visible: false
 lessons:
-   slug: simple-optical-elements
-   order: 2
+  - slug: simple-optical-elements
+    order: 2
 ---
 
 !!!! *CURSO EN CONSTRUCCIÓN :* <br>