diff --git a/main/inc/lib/sessionmanager.lib.php b/main/inc/lib/sessionmanager.lib.php
index 5abb137f87..24fd99d256 100644
--- a/main/inc/lib/sessionmanager.lib.php
+++ b/main/inc/lib/sessionmanager.lib.php
@@ -2245,11 +2245,13 @@ class SessionManager {
      * @params int new session id
      * @params int see SessionManager::get_session_change_user_reasons()
      */
-    static function change_user_session($user_id, $old_session_id, $new_session_id, $reason_id) {
-        if (!empty($user_id) && !empty($old_session_id) && !empty($new_session_id)) {
+    static function change_user_session($user_id, $old_session_id, $new_session_id=null, $reason_id) {
+        if (!empty($user_id) && !empty($old_session_id)) {
             $user_id = intval($user_id);
             $old_session_id = intval($old_session_id);
-            $new_session_id = intval($new_session_id);
+            if (!empty($new_session_id)) {
+                $new_session_id = intval($new_session_id);
+            }
             $reason_id = intval($reason_id);
             
             //self::unsubscribe_user_from_session($old_session_id, $user_id, $reason_id);             
@@ -2282,7 +2284,7 @@ class SessionManager {
             switch ($reason_id) {
                 case self::SESSION_CHANGE_USER_REASON_SCHEDULE:
                 case self::SESSION_CHANGE_USER_REASON_CLASSROOM:
-                case self::SESSION_CHANGE_USER_REASON_LOCATION:                       
+                case self::SESSION_CHANGE_USER_REASON_LOCATION:
                     //Adding to the new session
                     self::suscribe_users_to_session($new_session_id, array($user_id), null, false);
                     
@@ -2298,8 +2300,8 @@ class SessionManager {
             
             $now = api_get_utc_datetime();            
             //Setting the moved_status
-            $sql = "UPDATE $tbl_session_rel_user SET moved_status = $reason_id, moved_at = '$now'
-                    WHERE id_session = '$old_session_id' AND id_user ='$user_id'";            
+            $sql = "UPDATE $tbl_session_rel_user SET moved_status = $reason_id, moved_at = '$now' ".
+                   "WHERE id_session = '$old_session_id' AND id_user ='$user_id'";
             Database::query($sql);
             
             return true;            
@@ -2687,4 +2689,4 @@ class SessionManager {
         );        
         return $return_array;
     }   
-}
\ No newline at end of file
+}
diff --git a/tests/migrate/migration.custom.class.php b/tests/migrate/migration.custom.class.php
index b11a54d486..9dd5e55c8b 100644
--- a/tests/migrate/migration.custom.class.php
+++ b/tests/migrate/migration.custom.class.php
@@ -889,8 +889,9 @@ class MigrationCustom {
             if (!empty($session_id)) {
                 $before = SessionManager::get_user_status_in_session($session_id, $user_id);
                 //SessionManager::suscribe_users_to_session($session_id, array($user_id), SESSION_VISIBLE_READ_ONLY, false, false);
-                SessionManager::unsubscribe_user_from_session($session_id, $user_id);
-                $message = "Move Session to empty";
+                //SessionManager::unsubscribe_user_from_session($session_id, $user_id);
+                SessionManager::change_user_session($user_id, $session_id, null, 4);
+                $message = "Move Session to empty (cancelled subscription)";
                 return self::check_if_user_is_subscribe_to_session($user_id, $session_id, $message, $before);
             } else {
                 return array(