diff --git a/system/Config/BaseService.php b/system/Config/BaseService.php
index 2f8df2a35420..cd770dc667ed 100644
--- a/system/Config/BaseService.php
+++ b/system/Config/BaseService.php
@@ -389,8 +389,15 @@ protected static function buildServicesCache(): void
                 $locator = static::locator();
                 $files   = $locator->search('Config/Services');
 
+                $systemPath = static::autoloader()->getNamespace('CodeIgniter')[0];
+
                 // Get instances of all service classes and cache them locally.
                 foreach ($files as $file) {
+                    // Does not search `CodeIgniter` namespace to prevent from loading twice.
+                    if (str_starts_with($file, $systemPath)) {
+                        continue;
+                    }
+
                     $classname = $locator->findQualifiedNameFromPath($file);
 
                     if ($classname === false) {