diff --git a/migrations/20130307_remove_duff_histories.js b/migrations/20130307_remove_duff_histories.js
index e10889e173..6211693a1f 100644
--- a/migrations/20130307_remove_duff_histories.js
+++ b/migrations/20130307_remove_duff_histories.js
@@ -1,14 +1,14 @@
-// mongo habitrpg ./node_modules/underscore/underscore.js ./migrations/20130307_remove_duff_histories.js
 /**
  * Remove duff histories for dailies
  */
+// mongo habitrpg ./node_modules/underscore/underscore.js ./migrations/20130307_remove_duff_histories.js
 db.users.find().forEach(function(user){
 
 
     _.each(user.tasks, function(task, key){
-        // remove task history 
         if (task.type === "daily") {
-            task.history = []
+            // remove busted history entries
+            task.history = _.filter(task.history, function(h){return !!h.value})
         }
     });
 
diff --git a/src/app/scoring.coffee b/src/app/scoring.coffee
index 8664509ad5..1030ca133a 100644
--- a/src/app/scoring.coffee
+++ b/src/app/scoring.coffee
@@ -220,7 +220,7 @@ cron = (model) ->
             batch.set "tasks.#{taskObj.id}.value", newValue
 
           taskObj.history ?= []
-          taskObj.history.push { date: +new Date, value: newValue || taskObj.value }
+          taskObj.history.push { date: +new Date, value: taskObj.value }
           batch.set "tasks.#{taskObj.id}.history", taskObj.history
           batch.set "tasks.#{taskObj.id}.completed", false
         else