diff --git a/gen_pc_sidecar.php b/gen_pc_sidecar.php
index c9bf52f..a5a9b1b 100755
--- a/gen_pc_sidecar.php
+++ b/gen_pc_sidecar.php
@@ -200,14 +200,14 @@ function read_config_json($key) {
         $items = [];
     }
 
+    $items = array_values(array_filter($items, fn($v) => is_scalar($v)));
+
     $items = array_map(
         fn($v) => strtolower(trim((string)$v)),
         $items
     );
 
-    $items = array_values(array_filter($items, fn($v) => $v !== ''));
-
-    return $items;
+    return array_values(array_filter($items, fn($v) => $v !== ''));
 }
 
 function read_config_json_string($key) {