N°7080 - EVENT_DB_LINKS_CHANGED not fired when deleting a user

Fix regressions caused by deletion plan reorder

datamodels/2.x/itop-tickets/main.itop-tickets.php

@@ -134,6 +134,11 @@ class _Ticket extends cmdbAbstractObject
 
 	public function UpdateImpactedItems()
 	{
+		if ($this->IsNew() && ($this->GetKey() > 0)) {
+			// deleted ticket
+			return;
+		}
+
 		require_once(APPROOT.'core/displayablegraph.class.inc.php');
 		/** @var ormLinkSet $oContactsSet */
 		$oContactsSet = $this->Get('contacts_list');