diff --git a/deployment/restart_frontend.sh b/deployment/restart_frontend.sh
new file mode 100755
index 0000000..01dc15d
--- /dev/null
+++ b/deployment/restart_frontend.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+#
+# Restart IDS Frontend (Node.js/Express/Vite)
+# Utility per restart manuale del server frontend
+#
+
+set -e
+
+echo "🔄 Restart Frontend Node.js..."
+
+# Kill processi Vite esistenti
+echo "⏸️  Stopping existing processes..."
+pkill -f "vite" 2>/dev/null || true
+pkill -f "npm run dev" 2>/dev/null || true
+sleep 2
+
+# Verifica porta 5000 libera
+if lsof -Pi :5000 -sTCP:LISTEN -t >/dev/null 2>&1; then
+    echo "⚠️  Porta 5000 occupata, killing processo..."
+    lsof -ti:5000 | xargs kill -9 2>/dev/null || true
+    sleep 1
+fi
+
+# Restart usando check_frontend.sh
+echo "🚀 Starting frontend..."
+/opt/ids/deployment/check_frontend.sh
+
+# Attendi avvio
+sleep 3
+
+# Verifica
+if pgrep -f "vite" > /dev/null; then
+    PID=$(pgrep -f "vite")
+    echo "✅ Frontend avviato con PID: $PID"
+    echo "📡 Server disponibile su: http://localhost:5000"
+else
+    echo "❌ Errore: Frontend non avviato!"
+    echo "📋 Controlla log: tail -f /var/log/ids/frontend.log"
+    exit 1
+fi
diff --git a/shared/schema.ts b/shared/schema.ts
index 7fbdc43..0c711a6 100644
--- a/shared/schema.ts
+++ b/shared/schema.ts
@@ -1,5 +1,5 @@
 import { sql, relations } from "drizzle-orm";
-import { pgTable, text, varchar, integer, timestamp, decimal, boolean, index, bigint } from "drizzle-orm/pg-core";
+import { pgTable, text, varchar, integer, timestamp, decimal, boolean, index, bigint, unique } from "drizzle-orm/pg-core";
 import { createInsertSchema } from "drizzle-zod";
 import { z } from "zod";
 
@@ -121,6 +121,8 @@ export const networkAnalytics = pgTable("network_analytics", {
 }, (table) => ({
   dateHourIdx: index("network_analytics_date_hour_idx").on(table.date, table.hour),
   dateIdx: index("network_analytics_date_idx").on(table.date),
+  // CRITICAL: Vincolo UNIQUE per ON CONFLICT in aggregator
+  dateHourUnique: unique("network_analytics_date_hour_key").on(table.date, table.hour),
 }));
 
 // Schema version tracking for database migrations