From 287a1ebb59d45682ef96dbbfa7accc2e286d5f3c Mon Sep 17 00:00:00 2001
From: Akira <akia@keinafarm.com>
Date: Mon, 16 Mar 2026 16:40:06 +0900
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 frontend/src/app/distribution/_components/DeliveryEditPage.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/frontend/src/app/distribution/_components/DeliveryEditPage.tsx b/frontend/src/app/distribution/_components/DeliveryEditPage.tsx
index 07af0a8..a4637bb 100644
--- a/frontend/src/app/distribution/_components/DeliveryEditPage.tsx
+++ b/frontend/src/app/distribution/_components/DeliveryEditPage.tsx
@@ -239,7 +239,7 @@ export default function DeliveryEditPage({ planId }: Props) {
   // 未割り当て圃場（グループに入っていない + 選択肥料のエントリがある）
   const unassignedFields = useMemo(() => {
     const result: FieldInfo[] = [];
-    for (const fId of relevantFieldIds) {
+    for (const fId of Array.from(relevantFieldIds)) {
       if (!allGroupFieldIds.has(fId)) {
         result.push(getFieldInfo(fId));
       }