diff --git a/src/app/api/super-admin/OfficeFoldersController.ts b/src/app/api/super-admin/OfficeFoldersController.ts
index 36062499..85c52667 100644
--- a/src/app/api/super-admin/OfficeFoldersController.ts
+++ b/src/app/api/super-admin/OfficeFoldersController.ts
@@ -51,7 +51,12 @@ export default class OfficeFoldersController extends ApiController {
 			const officeFolderNumberExist = await this.officeFoldersService.get({where: {folder_number: officeFolderRessource.folder_number}});
 
 			if (officeFolderNumberExist) {
-				this.httpValidationError(response, "Folder number already taken");
+				this.httpValidationError(response, [{
+					property: "folder_number",
+					constraints: {
+						unique: "folder_number must be unique",
+					},
+				}]);
 				return;
 			}
 
diff --git a/src/common/system/controller-pattern/HttpCodes.ts b/src/common/system/controller-pattern/HttpCodes.ts
index f6ce001a..2d6d92c5 100644
--- a/src/common/system/controller-pattern/HttpCodes.ts
+++ b/src/common/system/controller-pattern/HttpCodes.ts
@@ -2,7 +2,7 @@ enum HttpCodes {
 	SUCCESS = 200,
 	CREATED = 201,
 	BAD_REQUEST = 400,
-	VALIDATION_ERROR = 422,
+	VALIDATION_ERROR = 409,
 	INTERNAL_ERROR = 500,
 	UNKNOWN_ERROR = 520,
 	NOT_IMPLEMENTED = 501,