diff --git a/db/migrate/20200912190210_update_weight_calculators.rb b/db/migrate/20200912190210_update_weight_calculators.rb
index 5ca5619f5a..d93e0d919e 100644
--- a/db/migrate/20200912190210_update_weight_calculators.rb
+++ b/db/migrate/20200912190210_update_weight_calculators.rb
@@ -6,7 +6,7 @@ class UpdateWeightCalculators < ActiveRecord::Migration
 
     Calculator::Weight.all.each { |calculator|
       calculator.preferred_unit_from_list = 'kg'
-      Rails.cache.delete("/calculator/weight/preferred_per_kg/#{calculator.id}")
+      Rails.cache.delete("/calculator/weight/per_kg/#{calculator.id}")
       calculator.save
     }
   end