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From: =?UTF-8?q?=E3=81=BF=E3=81=A6=E3=82=8B=E3=81=9E?= <miteruzo@naver.com>
Date: Sat, 14 Mar 2026 00:25:18 +0900
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#290

#290

'frontend/src/pages/posts/PostHistoryPage.tsx' を更新

'frontend/src/types.ts' を更新

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: https://git.miteruzo.com/miteruzo/btrc-hub/pulls/292
---
 frontend/src/pages/posts/PostHistoryPage.tsx | 6 ++++--
 frontend/src/types.ts                        | 4 ++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/frontend/src/pages/posts/PostHistoryPage.tsx b/frontend/src/pages/posts/PostHistoryPage.tsx
index 7fe2202..ab54ad2 100644
--- a/frontend/src/pages/posts/PostHistoryPage.tsx
+++ b/frontend/src/pages/posts/PostHistoryPage.tsx
@@ -71,7 +71,7 @@ export default (() => {
 			  ++rowsCnt
 		      }
 		    return (
-			<tr key={`${ change.timestamp }-${ change.post.id }-${ change.tag.id }`}
+			<tr key={`${ change.timestamp }-${ change.post.id }-${ change.tag?.id }`}
 			    className={cn ('even:bg-gray-100 dark:even:bg-gray-700',
 					   withPost && 'border-t')}>
 			  {withPost && (
@@ -92,7 +92,9 @@ export default (() => {
 				</PrefetchLink>
 			      </td>)}
 			  <td className="p-2">
-			    <TagLink tag={change.tag} withWiki={false} withCount={false}/>
+			    {change.tag
+			     ? <TagLink tag={change.tag} withWiki={false} withCount={false}/>
+			     : '(マスタ削除済のタグ) '}
 			    {`を${ change.changeType === 'add' ? '記載' : '消除' }`}
 			  </td>
 			  <td className="p-2">
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index d7b0afd..f40f533 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -54,8 +54,8 @@ export type Post = {
 
 export type PostTagChange = {
     post:       Post
-    tag:        Tag
-    user?:      User
+    tag:        Tag | null
+    user:       User | null
     changeType: 'add' | 'remove'
     timestamp:  string }