Index: lams_admin/src/java/org/lamsfoundation/lams/admin/web/controller/LtiConsumerManagementController.java
===================================================================
diff -u -r366880f4a40fe21eb563db2ccd2eb0dad3dc8aca -r436cbd9caa021f6dd47567eeb3a853523cbb0a79
--- lams_admin/src/java/org/lamsfoundation/lams/admin/web/controller/LtiConsumerManagementController.java	(.../LtiConsumerManagementController.java)	(revision 366880f4a40fe21eb563db2ccd2eb0dad3dc8aca)
+++ lams_admin/src/java/org/lamsfoundation/lams/admin/web/controller/LtiConsumerManagementController.java	(.../LtiConsumerManagementController.java)	(revision 436cbd9caa021f6dd47567eeb3a853523cbb0a79)
@@ -228,21 +228,6 @@
 		    }
 		}
 	    }
-
-	    List<ExtServer> listPrefix = userManagementService.findByProperty(ExtServer.class, "prefix",
-		    ltiConsumerForm.getPrefix());
-	    if (listPrefix != null && listPrefix.size() > 0) {
-		if (sid == null) {//new map
-		    errorMap.add("prefix", messageService.getMessage("error.not.unique",
-			    new Object[] { messageService.getMessage("sysadmin.prefix") }));
-		} else {
-		    ExtServer ltiConsumer = listPrefix.get(0);
-		    if (!ltiConsumer.getSid().equals(sid)) {
-			errorMap.add("prefix", messageService.getMessage("error.not.unique",
-				new Object[] { messageService.getMessage("sysadmin.prefix") }));
-		    }
-		}
-	    }
 	}
 
 	if (errorMap.isEmpty()) {
Index: lams_central/conf/language/lams/ApplicationResources.properties
===================================================================
diff -u -r50fabd2b7976cd956f18eb2991c5b386df2102b7 -r436cbd9caa021f6dd47567eeb3a853523cbb0a79
--- lams_central/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision 50fabd2b7976cd956f18eb2991c5b386df2102b7)
+++ lams_central/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision 436cbd9caa021f6dd47567eeb3a853523cbb0a79)
@@ -1142,3 +1142,5 @@
 index.organisation.link = Copy course link
 index.organisation.link.tooltip = Copy direct access course URL to clipboard
 index.organisation.link.success = Course URL copied to clipboard
+authoring.tbl.shuffle.questions = Shuffle question order in iRAT
+authoring.tbl.shuffle.questions.tooltip = Shuffles the order of questions in the iRAT for all students. In the tRAT the order of question will be the same for all students.