diff --git a/backend/services/productionOrderService.js b/backend/services/productionOrderService.js
index 15c2a4c..c7493f2 100644
--- a/backend/services/productionOrderService.js
+++ b/backend/services/productionOrderService.js
@@ -1718,9 +1718,9 @@ const updateProductionOrderStatus = async (id, status) => {
 
     const result = await pool.query(`
         UPDATE production_orders
-        SET status = $1,
+        SET status = $1::varchar,
             completed_date = CASE
-                WHEN $1 = 'finished' THEN COALESCE(completed_date, CURRENT_DATE)
+                WHEN $1::text = 'finished' THEN COALESCE(completed_date, CURRENT_DATE)
                 WHEN status = 'finished' THEN NULL
                 ELSE completed_date
             END,