Verlange menschliche Aktivierung echter Chargen

modules/erp/lager/service.php

@@ -193,6 +193,7 @@ function switch_current_lot(PDO $pdo, int $productId, int $oldCurrentLotId, int
          FROM stock_lot
          WHERE product_id = :product_id
            AND status = 'open'
+           AND lot_number IS NOT NULL
          ORDER BY id
          LIMIT 1
          FOR UPDATE"