diff --git a/services/mongodbflex/src/stackit/mongodbflex/configuration.py b/services/mongodbflex/src/stackit/mongodbflex/configuration.py
index 81166599..0b458a38 100644
--- a/services/mongodbflex/src/stackit/mongodbflex/configuration.py
+++ b/services/mongodbflex/src/stackit/mongodbflex/configuration.py
@@ -1,5 +1,10 @@
 # coding: utf-8
 
+import sys
+
+import os
+
+
 """
     STACKIT MongoDB Service API
 
@@ -12,8 +17,6 @@
     Do not edit the class manually.
 """  # noqa: E501 docstring might be too long
 
-import os
-
 
 class HostConfiguration:
     def __init__(
@@ -30,6 +33,7 @@ def __init__(
             "as a function argument instead of being set in the client configuration.\n"
             "Once all services have migrated, the methods to specify the region in the client configuration "
             "will be removed.",
+            file=sys.stderr,
         )
         """Constructor
         """