diff --git a/CHANGELOG.md b/CHANGELOG.md
index f76c3c72b52..6304573d7db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release Notes for Craft CMS 4
 
+## Unreleased
+
+- Fixed an error that occurred when creating a new Structure section. ([#16476](https://github.com/craftcms/cms/issues/16476))
+
 ## 4.14.0.1 - 2025-01-21
 
 - Fixed an error that occurred when referencing a single section entry by its handle. ([#16474](https://github.com/craftcms/cms/issues/16474))
diff --git a/src/services/Sections.php b/src/services/Sections.php
index e33288864dd..b3c47104dfa 100644
--- a/src/services/Sections.php
+++ b/src/services/Sections.php
@@ -616,8 +616,8 @@ public function handleChangedSection(ConfigEvent $event): void
                 // see https://github.com/craftcms/cms/issues/16450
                 if (
                     $isNewStructure &&
-                    $event->oldValue['type'] === Section::TYPE_STRUCTURE &&
-                    $event->oldValue['structure']['uid'] !== $structureUid &&
+                    ($event->oldValue['type'] ?? null) === Section::TYPE_STRUCTURE &&
+                    ($event->oldValue['structure']['uid'] ?? null) !== $structureUid &&
                     $sectionRecord->structureId
                 ) {
                     $structuresService->deleteStructureById($sectionRecord->structureId);