diff --git a/app/Services/PrizeImportService.php b/app/Services/PrizeImportService.php
index 58c1008..7b305e4 100644
--- a/app/Services/PrizeImportService.php
+++ b/app/Services/PrizeImportService.php
@@ -20,6 +20,10 @@ class PrizeImportService
         $failed = 0;
         $errors = [];
 
+        // Jejak susunan_cabutan yang telah dikosongkan (overwrite) dalam import ini,
+        // supaya item yang baru dimasukkan tidak dipadam semula oleh baris seterusnya.
+        $cleared = [];
+
         foreach ($rows as $i => $row) {
             $line = $i + 2;
 
@@ -35,6 +39,21 @@ class PrizeImportService
             $kodHadiah = trim($row['kod_hadiah'] ?? '');
             $batch = $kodHadiah !== '' ? $kodHadiah : 'B' . str_pad((string) ($i + 1), 4, '0', STR_PAD_LEFT);
 
+            // Overwrite data lama jika susunan_cabutan adalah nombor yang sama.
+            if ($drawOrder > 0 && ! isset($cleared[$drawOrder])) {
+                $existing = Prize::where('draw_order', $drawOrder)->get();
+
+                if ($existing->contains(fn (Prize $p) => $p->status === Prize::STATUS_DISAHKAN)) {
+                    $failed++;
+                    $errors[] = "Baris {$line}: susunan_cabutan {$drawOrder} sudah ada pemenang disahkan, tidak boleh ditulis ganti.";
+                    continue;
+                }
+
+                $duplicate += $existing->count();
+                Prize::where('draw_order', $drawOrder)->delete();
+                $cleared[$drawOrder] = true;
+            }
+
             try {
                 foreach ($this->expand($nama, $kuantiti) as $index => $itemName) {
                     Prize::create([
diff --git a/resources/views/admin/prizes/import.blade.php b/resources/views/admin/prizes/import.blade.php
index 46879a4..f22110c 100644
--- a/resources/views/admin/prizes/import.blade.php
+++ b/resources/views/admin/prizes/import.blade.php
@@ -8,7 +8,8 @@
         <div class="card"><div class="card-body">
             <h5 class="fw-bold"><i class="bi bi-upload text-teal"></i> Muat Naik Fail</h5>
             <p class="text-muted small">Format CSV atau XLSX. Lajur: <code>kod_hadiah, nama_hadiah, kategori, nilai_anggaran, susunan_cabutan, kuantiti</code>.
-            Jika <b>kuantiti &gt; 1</b>, sistem akan jana beberapa item berasingan (cth Hamper #1 … #5).</p>
+            Jika <b>kuantiti &gt; 1</b>, sistem akan jana beberapa item berasingan (cth Hamper #1 … #5).
+            Data lama akan <b>ditulis ganti</b> jika <code>susunan_cabutan</code> adalah nombor yang sama (kecuali yang sudah ada pemenang disahkan).</p>
             <form method="POST" action="{{ route('admin.prizes.import.store') }}" enctype="multipart/form-data">
                 @csrf
                 <input type="file" name="file" class="form-control mb-2 @error('file') is-invalid @enderror" accept=".csv,.xlsx,.xls" required>
@@ -25,6 +26,7 @@
                 <div class="row text-center g-2 my-2">
                     <div class="col"><div class="stat-card bg-teal py-2"><div class="value fs-4">{{ $result->total_rows }}</div><div class="label">Baris</div></div></div>
                     <div class="col"><div class="stat-card bg-green py-2"><div class="value fs-4">{{ $result->success_count }}</div><div class="label">Item Dijana</div></div></div>
+                    <div class="col"><div class="stat-card bg-gold py-2"><div class="value fs-4">{{ $result->duplicate_count }}</div><div class="label">Ditulis Ganti</div></div></div>
                     <div class="col"><div class="stat-card bg-red py-2"><div class="value fs-4">{{ $result->failed_count }}</div><div class="label">Gagal</div></div></div>
                 </div>
                 @if($result->errors)
diff --git a/tests/Feature/ImportTest.php b/tests/Feature/ImportTest.php
index d81b18e..6702dce 100644
--- a/tests/Feature/ImportTest.php
+++ b/tests/Feature/ImportTest.php
@@ -51,4 +51,34 @@ class ImportTest extends TestCase
         $this->assertDatabaseHas('prizes', ['nama_hadiah' => 'Hamper #5', 'draw_order' => 3]);
         $this->assertDatabaseHas('prizes', ['nama_hadiah' => 'Motosikal', 'draw_order' => 1]);
     }
+
+    public function test_prize_import_overwrites_same_susunan_cabutan(): void
+    {
+        $service = new PrizeImportService();
+        $service->import([['nama_hadiah' => 'Hadiah Lama', 'kuantiti' => '2', 'susunan_cabutan' => '1']], 'lama.csv');
+
+        $this->assertEquals(2, Prize::where('draw_order', 1)->count());
+
+        $log = $service->import([['nama_hadiah' => 'Hadiah Baru', 'kuantiti' => '1', 'susunan_cabutan' => '1']], 'baru.csv');
+
+        $this->assertEquals(1, $log->success_count);
+        $this->assertEquals(2, $log->duplicate_count);
+        $this->assertEquals(1, Prize::where('draw_order', 1)->count());
+        $this->assertDatabaseHas('prizes', ['nama_hadiah' => 'Hadiah Baru', 'draw_order' => 1]);
+        $this->assertDatabaseMissing('prizes', ['nama_hadiah' => 'Hadiah Lama']);
+    }
+
+    public function test_prize_import_does_not_overwrite_confirmed_winner(): void
+    {
+        $service = new PrizeImportService();
+        $service->import([['nama_hadiah' => 'Hadiah Disahkan', 'kuantiti' => '1', 'susunan_cabutan' => '1']], 'lama.csv');
+        Prize::where('draw_order', 1)->update(['status' => Prize::STATUS_DISAHKAN]);
+
+        $log = $service->import([['nama_hadiah' => 'Cuba Ganti', 'kuantiti' => '1', 'susunan_cabutan' => '1']], 'baru.csv');
+
+        $this->assertEquals(0, $log->success_count);
+        $this->assertEquals(1, $log->failed_count);
+        $this->assertDatabaseHas('prizes', ['nama_hadiah' => 'Hadiah Disahkan']);
+        $this->assertDatabaseMissing('prizes', ['nama_hadiah' => 'Cuba Ganti']);
+    }
 }