diff --git a/db/migrate/20190705013203_modify_praises_count_for_challenges.rb b/db/migrate/20190705013204_modify_praises_count_for_challenges.rb
similarity index 84%
rename from db/migrate/20190705013203_modify_praises_count_for_challenges.rb
rename to db/migrate/20190705013204_modify_praises_count_for_challenges.rb
index 35711027a..4cf975f3d 100644
--- a/db/migrate/20190705013203_modify_praises_count_for_challenges.rb
+++ b/db/migrate/20190705013204_modify_praises_count_for_challenges.rb
@@ -1,6 +1,6 @@
 class ModifyPraisesCountForChallenges < ActiveRecord::Migration[5.2]
   def change
-    challenges = Challenge.where(nil).unscope
+    challenges = Challenge.where(nil).unscoped
     challenges.find_each do |c|
       praises_count = c.praise_tread.where(praise_or_tread: 1).count
       c.update_column(:praises_count, praises_count)