diff --git a/app/models/metadata_has_many.rb b/app/models/metadata_has_many.rb
index c4bc06c..cf7a1b0 100644
--- a/app/models/metadata_has_many.rb
+++ b/app/models/metadata_has_many.rb
@@ -32,7 +32,7 @@ class MetadataHasMany < MetadataRelatedPosts
   #
   # @return [Nil,Symbol]
   def inverse
-    layout.metadata.dig(name, 'inverse')&.to_sym
+    @inverse ||= layout.metadata.dig(name, 'inverse')&.to_sym
   end
 
   # Actualizar las relaciones inversas.  Hay que buscar la diferencia