diff --git a/app/models/swf_asset.rb b/app/models/swf_asset.rb
index 2687b2ae..d1c53ba1 100644
--- a/app/models/swf_asset.rb
+++ b/app/models/swf_asset.rb
@@ -338,7 +338,7 @@ class SwfAsset < ApplicationRecord
     end
 
     SwfAsset.transaction do
-      swf_assets.each(&:save!)
+      swf_assets.select(&:changed?).each(&:save!)
     end
   end