diff --git a/modules/erp/lager/service.php b/modules/erp/lager/service.php
index 468dca8..adb6eb3 100644
--- a/modules/erp/lager/service.php
+++ b/modules/erp/lager/service.php
@@ -523,7 +523,7 @@ function sync_open_lot_activation_selection(PDO $pdo, int $productId): void
             "SELECT sl.id
              FROM stock_lot sl
              INNER JOIN v_stock_lot_balance v ON v.stock_lot_id = sl.id
-             WHERE product_id = :product_id
+             WHERE sl.product_id = :product_id
                AND sl.status = 'open'
                AND NULLIF(TRIM(sl.lot_number), '') IS NOT NULL
                AND sl.manufacturer_party_id IS NOT NULL