diff --git a/setup/extensionsmap.class.inc.php b/setup/extensionsmap.class.inc.php
index 6063ea76c..a03cdfb2b 100644
--- a/setup/extensionsmap.class.inc.php
+++ b/setup/extensionsmap.class.inc.php
@@ -454,7 +454,8 @@ class iTopExtensionsMap
 	 */
 	public function GetAllExtensionsWithPreviouslyInstalled(): array
 	{
-		return array_merge($this->aExtensions, $this->aInstalledExtensions ?? []);
+		//Mind the order, local extensions data must overwrite installed extensions data since installed extensions does not have the associated modules.
+		return array_merge($this->aInstalledExtensions ?? [] , $this->aExtensions );
 	}
 
 	/**