Index: lams_common/src/java/org/lamsfoundation/lams/lesson/LessonClass.java
===================================================================
diff -u -r1ee503e3d0e0228ea8a45025fddf15d9623c0377 -rb4b4d802a11bccab9ca9de7a0a91097b333c21f4
--- lams_common/src/java/org/lamsfoundation/lams/lesson/LessonClass.java	(.../LessonClass.java)	(revision 1ee503e3d0e0228ea8a45025fddf15d9623c0377)
+++ lams_common/src/java/org/lamsfoundation/lams/lesson/LessonClass.java	(.../LessonClass.java)	(revision b4b4d802a11bccab9ca9de7a0a91097b333c21f4)
@@ -41,6 +41,7 @@
 import org.lamsfoundation.lams.learningdesign.Grouping;
 import org.lamsfoundation.lams.usermanagement.Organisation;
 import org.lamsfoundation.lams.usermanagement.User;
+import org.lamsfoundation.lams.usermanagement.service.UserManagementService;
 
 /**
  * A type of Grouping that represents all the Learners in a Lesson. The
@@ -60,9 +61,6 @@
     @JoinColumn(name = "staff_group_id")
     private Group staffGroup;
 
-    @OneToOne(fetch = FetchType.LAZY, mappedBy = "lessonClass")
-    private Lesson lesson;
-
     /** Creates a new instance of LessonClass */
     public LessonClass() {
     }
@@ -72,7 +70,6 @@
 	//don't think lesson class need perform doGrouping. set grouper to null.
 	super(groupingId, groups, activities, null);
 	this.staffGroup = staffGroup;
-	this.lesson = lesson;
     }
 
     public Group getStaffGroup() {
@@ -83,14 +80,6 @@
 	this.staffGroup = staffGroup;
     }
 
-    public Lesson getLesson() {
-	return lesson;
-    }
-
-    public void setLesson(Lesson lesson) {
-	this.lesson = lesson;
-    }
-
     /**
      * @see org.lamsfoundation.lams.learningdesign.Grouping#isLearnerGroup(org.lamsfoundation.lams.learningdesign.Group)
      *      Returns false if group is null
@@ -113,7 +102,6 @@
     public Grouping createCopy(int uiidOffset) {
 	LessonClass lessonClass = new LessonClass();
 	lessonClass.staffGroup = this.staffGroup;
-	lessonClass.lesson = this.lesson;
 	return lessonClass;
     }
 
@@ -302,4 +290,9 @@
 	return staffGroup;
     }
 
+    private Lesson getLesson() {
+	return (Lesson) UserManagementService.getInstance()
+		.findByProperty(Lesson.class, "lessonClass.groupingId", getGroupingId()).get(0);
+    }
+
 }
\ No newline at end of file
Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java
===================================================================
diff -u -r2188972474f8d186d6811e3dea2e4136be669335 -rb4b4d802a11bccab9ca9de7a0a91097b333c21f4
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java	(.../MonitoringService.java)	(revision 2188972474f8d186d6811e3dea2e4136be669335)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java	(.../MonitoringService.java)	(revision b4b4d802a11bccab9ca9de7a0a91097b333c21f4)
@@ -491,7 +491,6 @@
 
 	    LessonClass newLessonClass = this.createLessonClass(organisation, learnerGroupName, organizationUsers,
 		    staffGroupName, staffs, newLesson);
-	    newLessonClass.setLesson(newLesson);
 	    newLesson.setLessonClass(newLessonClass);
 
 	    lessonDAO.updateLesson(newLesson);