diff --git a/calendar/inc/class.calendar_boupdate.inc.php b/calendar/inc/class.calendar_boupdate.inc.php
index 6b840ea2e3..10e3dd717d 100644
--- a/calendar/inc/class.calendar_boupdate.inc.php
+++ b/calendar/inc/class.calendar_boupdate.inc.php
@@ -2934,13 +2934,15 @@ class calendar_boupdate extends calendar_bo
 	 */
 	protected function check_reset_stati(&$event, $old_event)
 	{
-		if(!$old_event || !is_array($old_event))
+		if(!$old_event || !is_array($old_event) || $event['start'] == $old_event['start'])
 		{
 			return false;
 		}
 
 		$status_reset = false;
 		$sameday = (date('Ymd', $old_event['start']) == date('Ymd', $event['start']));
+		$preferences = new Api\Preferences($uid);
+		$part_prefs = $preferences->read_repository();
 		foreach((array)$event['participants'] as $uid => $status)
 		{
 			$q = $r = null;
@@ -2953,8 +2955,6 @@ class calendar_boupdate extends calendar_bo
 			// Just user accounts
 			if (is_int($uid))
 			{
-				$preferences = new Api\Preferences($uid);
-				$part_prefs = $preferences->read_repository();
 				switch ($part_prefs['calendar']['reset_stati'])
 				{
 					case 'no':