From 20207f4ff54646d49d1b9492364e7b8b93139ed5 Mon Sep 17 00:00:00 2001
From: Josh Crawford <joshua@sgroup.com.au>
Date: Wed, 10 Jul 2024 13:39:57 +1000
Subject: [PATCH] Fix an error when saving a new site

---
 src/services/VoucherTypes.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/VoucherTypes.php b/src/services/VoucherTypes.php
index beaf261..1b5fcdb 100755
--- a/src/services/VoucherTypes.php
+++ b/src/services/VoucherTypes.php
@@ -434,7 +434,7 @@ public function afterSaveSiteHandler(SiteEvent $event): void
     {
         $projectConfig = Craft::$app->getProjectConfig();
 
-        if ($event->isNew) {
+        if ($event->isNew && isset($event->oldPrimarySiteId)) {
             $oldPrimarySiteUid = Db::uidById(Table::SITES, $event->oldPrimarySiteId);
             $existingVoucherTypeSettings = $projectConfig->get(self::CONFIG_VOUCHERTYPES_KEY);