diff --git a/core/class/calendar.class.php b/core/class/calendar.class.php
index 12c1e58..7d4386d 100644
--- a/core/class/calendar.class.php
+++ b/core/class/calendar.class.php
@@ -317,11 +317,9 @@ class calendarCmd extends cmd {
 
 	/*     * *********************Methode d'instance************************* */
 
-	public function dontRemoveCmd() {
-		if (in_array($this->getLogicalId(), array('in_progress', 'add_exclude_date', 'add_include_date'))) {
-			return true;
-		}
-		return false;
+	public function dontRemoveCmd()
+	{
+		return true; // on ne supprime aucune commandes
 	}
 
 	public function postInsert() {