Fix a big bug when creating a requset for change course, add ace to course, add is to course.

application/modules/courses/models/CourseModel.php

@@ -1386,7 +1386,8 @@ class Courses_CourseModel extends Unl_Model
 
 	public function __clone()
 	{
-		$this->_data['parentId'] = $this->getId();
+		$this->_data['parent'] = $this->getId();
+		$this->_data['type'] = 'proposed';
 
         unset($this->_data['assetId']);
         unset($this->_data['courseGenerationId']);