fix issue

packages/types/src/freight/contracts.ts

@@ -179,6 +179,13 @@ export interface IContractCargoScope {
     code?: string | null;
     cargoTypeName?: string | null;
     unitOfMeasure?: string | null;
+    /**
+     * Most tons of this cargo one wagon may carry, across the cargo's allowed
+     * wagon types (rated capacity, capped by the type's loading limit). Lets
+     * the booking forms reject a wagon count whose even share overloads a
+     * wagon before the server does. Null when no wagon type is configured.
+     */
+    maxTonsPerWagon?: number | null;
   } | null;
   cargoFreeText?: string | null;
   /**