diff --git a/app/api/internal_catalog.py b/app/api/internal_catalog.py
index abf4ad4..33d2148 100644
--- a/app/api/internal_catalog.py
+++ b/app/api/internal_catalog.py
@@ -36,7 +36,7 @@ def internal_list_modules(
             {
                 "id": i.id,
                 "module_key": i.module_key,
-                "system_key": i.module_key.split(".", 1)[0] if "." in i.module_key else None,
+                "system_key": i.system_key,
                 "name": i.name,
                 "status": i.status,
             }