fix error

app/models/bulletin_feed.rb

@@ -171,6 +171,7 @@ class BulletinFeed
       "tags" => tag_names,
       "categories" => category_titles
     }.to_json
+    BulletinFeedCache.where(uid: uid,start: startdt,end: enddt,date: dt).destroy
     feed_cache = BulletinFeedCache.create(uid: uid,content: anns,start: startdt,end: enddt,date: dt,invalid_date: invalid_date)
   end
   def self.smart_convertor(text,url)