From 660bb7bd5cf83798239df69f60b5ba043fda229b Mon Sep 17 00:00:00 2001
From: atm-irvine <165771178+atm-irvine@users.noreply.github.com>
Date: Sat, 6 Apr 2024 13:30:28 +0200
Subject: [PATCH] FIX: Undefined array key default on fields (#29243)

---
 htdocs/core/actions_addupdatedelete.inc.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/htdocs/core/actions_addupdatedelete.inc.php b/htdocs/core/actions_addupdatedelete.inc.php
index 754e3eceda3..42934c3f9ca 100644
--- a/htdocs/core/actions_addupdatedelete.inc.php
+++ b/htdocs/core/actions_addupdatedelete.inc.php
@@ -274,7 +274,7 @@ if ($action == 'update' && !empty($permissiontoadd)) {
 		}
 
 		$object->$key = $value;
-		if ($val['notnull'] > 0 && $object->$key == '' && is_null($val['default'])) {
+		if ($val['notnull'] > 0 && $object->$key == '' && (!isset($val['default']) || is_null($val['default']))) {
 			$error++;
 			setEventMessages($langs->trans("ErrorFieldRequired", $langs->transnoentitiesnoconv($val['label'])), null, 'errors');
 		}