diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74891abd71b..c33f39b6533 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 - Fixed a SQL error that occurred when running the `db/convert-charset` command if there were any custom database views or sequences. ([#15598](https://github.com/craftcms/cms/issues/15598))
 - Fixed a bug where `craft\helpers\Db::supportsTimeZones()` could return `false` on databases that supported time zone conversion. ([#15592](https://github.com/craftcms/cms/issues/15592))
 - Fixed a bug where Assets fields were validating settings that weren’t applicable depending on the “Restrict assets to a single location” setting. ([#15545](https://github.com/craftcms/cms/issues/15545))
+- Fixed a bug where `null` values within associative arrays were ignored when applying project config data. ([#10512](https://github.com/craftcms/cms/issues/10512))
 
 ## 4.11.5 - 2024-08-26
 
diff --git a/src/helpers/ProjectConfig.php b/src/helpers/ProjectConfig.php
index 5d8d394db6b..bd3c1495c6a 100644
--- a/src/helpers/ProjectConfig.php
+++ b/src/helpers/ProjectConfig.php
@@ -418,7 +418,7 @@ public static function unpackAssociativeArray(array $array, bool $recursive = tr
             $associative = [];
             if (!empty($array[ProjectConfigService::ASSOC_KEY])) {
                 foreach ($array[ProjectConfigService::ASSOC_KEY] as $items) {
-                    if (!isset($items[0], $items[1])) {
+                    if (!array_key_exists(0, $items) || !array_key_exists(1, $items)) {
                         Craft::warning('Skipping incomplete packed associative array data', __METHOD__);
                         continue;
                     }
diff --git a/src/translations/nl/app.php b/src/translations/nl/app.php
index 992247c5c32..59cb2460385 100644
--- a/src/translations/nl/app.php
+++ b/src/translations/nl/app.php
@@ -977,7 +977,7 @@
     'New widget' => 'Nieuwe widget',
     'New {group} category' => 'Nieuwe {group} categorie',
     'New {section} entry' => 'Nieuwe {section} vermelding',
-    'New {type}' => 'Nieuwe klasse {type}',
+    'New {type}' => 'Nieuwe {type}',
     'New' => 'Nieuw',
     'Next Page' => 'Volgende pagina',
     'Next' => 'Volgende',