diff --git a/backend/app/controllers/api/charts_controller.rb b/backend/app/controllers/api/charts_controller.rb
index 44184e1..9077f16 100644
--- a/backend/app/controllers/api/charts_controller.rb
+++ b/backend/app/controllers/api/charts_controller.rb
@@ -149,7 +149,7 @@ def all
 
       charts =
         Chart
-          .preload(%i[author co_authors variants tags])
+          .preload(%i[author co_authors tags])
           .limit(length)
           .offset(params[:offset].to_i || 0)
           .where(**cond)
diff --git a/backend/app/models/chart.rb b/backend/app/models/chart.rb
index 32dabee..7168929 100644
--- a/backend/app/models/chart.rb
+++ b/backend/app/models/chart.rb
@@ -32,7 +32,7 @@ class Chart < ApplicationRecord
   enum :visibility, VISIBILITY, prefix: "visibility"
 
   def self.include_all
-    preload(%i[author co_authors variants tags file_resources]).merge(
+    preload(%i[author co_authors _variants tags file_resources]).merge(
       FileResource.with_attached_file
     )
   end