From 6e90eb8d18839cf6d482ac286ade461e1c9044f1 Mon Sep 17 00:00:00 2001
From: simon-matt-oetztal
 <130133335+simon-matt-oetztal@users.noreply.github.com>
Date: Thu, 9 Jan 2025 10:07:08 +0100
Subject: [PATCH] [Bug]: API Channel: mapped numeric IDs get lost when using
 fieldsets (#495) (#496)

---
 src/OutputWorkflow/Channel/Api/ApiOutputChannelWorker.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/OutputWorkflow/Channel/Api/ApiOutputChannelWorker.php b/src/OutputWorkflow/Channel/Api/ApiOutputChannelWorker.php
index b3ba625f..fc69a694 100644
--- a/src/OutputWorkflow/Channel/Api/ApiOutputChannelWorker.php
+++ b/src/OutputWorkflow/Channel/Api/ApiOutputChannelWorker.php
@@ -128,7 +128,7 @@ protected function buildApiNodes(array $nodes, array $formData, array $mapping,
             if ($hasChildren) {
                 $apiField = $hasParent ? $nodes : [];
                 if ($formField['type'] === 'fieldset' && count($apiMappingFields) === 0) {
-                    $nodes = array_merge([], ...[$nodes, $this->buildApiNodes($apiField, $formData, $mapRow['children'], true, $formField['type'])]);
+                    $nodes = array_replace([], ...[$nodes, $this->buildApiNodes($apiField, $formData, $mapRow['children'], true, $formField['type'])]);
                 } else {
                     foreach ($apiMappingFields as $apiMappingField) {
                         $nodes[$apiMappingField] = $this->buildApiNodes($apiField, $formData, $mapRow['children'], true, $formField['type']);