diff --git a/migration/20.10/2010.sql b/migration/20.10/2010.sql
index 3f657347e4a9cb336f6e41221bea875df31e6628..3420addd3bfc8e37617129b09da09e6aaaf3c715 100755
--- a/migration/20.10/2010.sql
+++ b/migration/20.10/2010.sql
@@ -360,6 +360,18 @@ INSERT INTO parameters (id, description, param_value_int) VALUES ('maximumSignRo
 
 UPDATE history_batch SET total_errors = 0 WHERE total_errors IS NULL;
 
+DO $$ BEGIN
+    IF (SELECT count(id) from parameters where id = 'homepage_message') = 0 THEN
+        INSERT INTO parameters (id, param_value_string) VALUES ('homepage_message', '');
+    END IF;
+END$$;
+DO $$ BEGIN
+    IF (SELECT count(id) from parameters where id = 'loginpage_message') = 0 THEN
+        INSERT INTO parameters (id, param_value_string) VALUES ('loginpage_message', '');
+    END IF;
+END$$;
+
+
 /* ORDER ON CHRONO */
 CREATE OR REPLACE FUNCTION order_alphanum(text) RETURNS text AS $$
 declare
diff --git a/src/app/parameter/controllers/ParameterController.php b/src/app/parameter/controllers/ParameterController.php
index fe0ccfb57460113017c652e3cc39f4c128425502..70af818afca4602a41b5be3127b44923cacda000 100755
--- a/src/app/parameter/controllers/ParameterController.php
+++ b/src/app/parameter/controllers/ParameterController.php
@@ -48,6 +48,28 @@ class ParameterController
             }
         }
 
+        $parameterIds = array_column($parameters, 'id');
+        if (!in_array('loginpage_message', $parameterIds)) {
+            $parameters[] = [
+                "description"        => null,
+                "id"                 => "loginpage_message",
+                "param_value_date"   => null,
+                "param_value_int"    => null,
+                "param_value_string" => "",
+                "value"              => ""
+            ];
+        }
+        if (!in_array('homepage_message', $parameterIds)) {
+            $parameters[] = [
+                "description"        => null,
+                "id"                 => "homepage_message",
+                "param_value_date"   => null,
+                "param_value_int"    => null,
+                "param_value_string" => "",
+                "value"              => ""
+            ];
+        }
+
         return $response->withJson(['parameters' => $parameters]);
     }