diff --git a/app/Services/Quote/QuoteService.php b/app/Services/Quote/QuoteService.php
index cc71695..34e05e0 100644
--- a/app/Services/Quote/QuoteService.php
+++ b/app/Services/Quote/QuoteService.php
@@ -689,11 +689,23 @@ public function convertToOrder(int $id): Quote
             }
 
             // 수주 상세 품목 생성 (노드 연결 포함)
+            // formula_source 없는 레거시 데이터용: sort_order 기반 분배 준비
+            $locationCount = count($productItems);
+            $hasFormulaSource = $quote->items->contains(fn ($item) => ! empty($item->formula_source));
+            $itemsPerLocation = (! $hasFormulaSource && $locationCount > 1)
+                ? intdiv($quote->items->count(), $locationCount)
+                : 0;
+
             $serialIndex = 1;
-            foreach ($quote->items as $quoteItem) {
+            foreach ($quote->items as $index => $quoteItem) {
                 $productMapping = $this->resolveLocationMapping($quoteItem, $productItems);
                 $locIdx = $this->resolveLocationIndex($quoteItem, $productItems);
 
+                // sort_order 기반 분배 (formula_source/note 매칭 모두 실패 시)
+                if ($locIdx === 0 && $itemsPerLocation > 0) {
+                    $locIdx = min(intdiv($index, $itemsPerLocation), $locationCount - 1);
+                }
+
                 $productMapping['order_node_id'] = isset($nodeMap[$locIdx]) ? $nodeMap[$locIdx]->id : null;
 
                 $orderItem = OrderItem::createFromQuoteItem($quoteItem, $order->id, $serialIndex, $productMapping);