diff --git a/app/models/edu_setting.rb b/app/models/edu_setting.rb
index 64cec6e92..4a38d6122 100644
--- a/app/models/edu_setting.rb
+++ b/app/models/edu_setting.rb
@@ -17,6 +17,7 @@
 
 class EduSetting < ApplicationRecord
   after_commit :expire_value_cache
+  after_commit :clear_value_cache, on: :destroy
 
   scope :by_search,     -> (keyword){ where("name LIKE :keyword OR value LIKE :keyword", keyword: "%#{strip_param(keyword)}%") unless strip_param(keyword).blank? }
 
@@ -45,4 +46,8 @@ class EduSetting < ApplicationRecord
   def expire_value_cache
     Rails.cache.write(value_cache_key, value)
   end
+
+  def clear_value_cache
+    Rails.cache.delete(value_cache_key)
+  end
 end