diff --git a/App/app/(portal)/admin/products/actions.ts b/App/app/(portal)/admin/products/actions.ts
index cf4ec56..277097f 100644
--- a/App/app/(portal)/admin/products/actions.ts
+++ b/App/app/(portal)/admin/products/actions.ts
@@ -45,14 +45,17 @@ export async function updateProduct(formData: FormData): Promise<ActionResult> {
   if (!id) return { error: "Product ID required" };
 
   const parsed = z.object({
-    name: z.string().min(1).max(200),
+    code: z.string().min(1).max(50),
     description: z.string().optional(),
   }).safeParse({
-    name: formData.get("name"),
+    code: formData.get("code"),
     description: formData.get("description") || undefined,
   });
   if (!parsed.success) return { error: parsed.error.errors[0].message };
 
+  const conflict = await db.product.findFirst({ where: { code: parsed.data.code, id: { not: id } } });
+  if (conflict) return { error: "Another product already uses that code." };
+
   await db.product.update({ where: { id }, data: parsed.data });
   revalidatePath("/admin/products");
   return { ok: true };
diff --git a/App/app/(portal)/admin/products/product-form.tsx b/App/app/(portal)/admin/products/product-form.tsx
index dd7f6c0..b108e6f 100644
--- a/App/app/(portal)/admin/products/product-form.tsx
+++ b/App/app/(portal)/admin/products/product-form.tsx
@@ -18,15 +18,15 @@ function ProductFormFields({ product }: { product?: ProductRow }) {
     <div className="space-y-3">
       <div>
         <label className="block text-xs font-medium text-neutral-700 mb-1">Product Code *</label>
-        <input name="code" defaultValue={product?.code} required disabled={!!product}
-          className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20 disabled:bg-neutral-50 disabled:text-neutral-400"
+        <input name="code" defaultValue={product?.code} required
+          className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20"
           placeholder="e.g. FUEL-OIL-001" />
-        {product && <p className="mt-1 text-xs text-neutral-400">Product code cannot be changed after creation.</p>}
       </div>
       <div>
-        <label className="block text-xs font-medium text-neutral-700 mb-1">Name *</label>
-        <input name="name" defaultValue={product?.name} required
-          className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20" />
+        <label className="block text-xs font-medium text-neutral-700 mb-1">Name</label>
+        <input name="name" defaultValue={product?.name} required disabled={!!product}
+          className="w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20 disabled:bg-neutral-50 disabled:text-neutral-400" />
+        {product && <p className="mt-1 text-xs text-neutral-400">Name is locked after creation.</p>}
       </div>
       <div>
         <label className="block text-xs font-medium text-neutral-700 mb-1">Description</label>