diff --git a/frontend/src/OspfToolsPage.jsx b/frontend/src/OspfToolsPage.jsx
index 27e87fa..eb4099b 100644
--- a/frontend/src/OspfToolsPage.jsx
+++ b/frontend/src/OspfToolsPage.jsx
@@ -320,18 +320,17 @@ export default function OspfToolsPage() {
 
     let changedCount = 0;
     let hintedCount = 0;
-    setTemplates((prev) =>
-      prev.map((item) => {
-        const hintKey = `${item.routerKey}::${item.area}::${String(item.interfaceName || '').toUpperCase()}`;
-        const hint = hints[hintKey];
-        if (!hint) return item;
-        hintedCount += 1;
-        const nextCost = Number(hint.optimalCost);
-        if (!Number.isFinite(nextCost) || nextCost < 0 || Number(item.cost) === nextCost) return item;
-        changedCount += 1;
-        return { ...item, cost: nextCost };
-      })
-    );
+    const nextTemplates = (templates || []).map((item) => {
+      const hintKey = `${item.routerKey}::${item.area}::${String(item.interfaceName || '').toUpperCase()}`;
+      const hint = hints[hintKey];
+      if (!hint) return item;
+      hintedCount += 1;
+      const nextCost = Number(hint.optimalCost);
+      if (!Number.isFinite(nextCost) || nextCost < 0 || Number(item.cost) === nextCost) return item;
+      changedCount += 1;
+      return { ...item, cost: nextCost };
+    });
+    setTemplates(nextTemplates);
 
     if (hintedCount === 0) {
       notify.warning('Для интерфейсов на странице нет рекомендаций оптимизатора');