diff --git a/app/assets/javascripts/app/lib/app_post/task_manager.js.coffee b/app/assets/javascripts/app/lib/app_post/task_manager.js.coffee
index dc772333e..d6731dbb3 100644
--- a/app/assets/javascripts/app/lib/app_post/task_manager.js.coffee
+++ b/app/assets/javascripts/app/lib/app_post/task_manager.js.coffee
@@ -356,6 +356,9 @@ class _taskManagerSingleton extends App.Controller
 
     # destory task in backend
     delete @tasksToUpdate[ task.key ]
+
+    # if task isnt already stored on backend
+    return if !task.id
     App.Taskbar.destroy(task.id)
     return