diff --git a/app/models/project.rb b/app/models/project.rb
index 9d3eb4a3d..5cf53cc8e 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -70,7 +70,7 @@ class Project < ActiveRecord::Base
 
   has_one :wiki, :dependent => :destroy
   ##added by xianbo
-  has_one :course, :dependent => :destroy ,:order => "#{Version.table_name}.effective_date DESC, #{Version.table_name}.name DESC"
+  has_one :course, :order => "#{Version.table_name}.effective_date DESC, #{Version.table_name}.name DESC"
   accepts_nested_attributes_for :course
   ##end
     # Custom field for the project issues