diff --git a/front/src/modules/rollingStock/helpers/utils.ts b/front/src/modules/rollingStock/helpers/utils.ts
index 6beb0fe0940..bc9deb0acb8 100644
--- a/front/src/modules/rollingStock/helpers/utils.ts
+++ b/front/src/modules/rollingStock/helpers/utils.ts
@@ -118,6 +118,7 @@ export const getRollingStockEditorDefaultValues = (
       }
     : {
         ...newRollingStockValues,
+        categories: new Set(),
       };
 
 export const rollingStockEditorQueryArg = (