diff --git a/app/releases.js b/app/releases.js
index bb373a4..b338a17 100644
--- a/app/releases.js
+++ b/app/releases.js
@@ -58,6 +58,12 @@ export async function cleanupReleases(client, config) {
   const toDelete = selectReleasesToDelete(releases, config.keepCount)
 
   for (const release of toDelete) {
+    // 防禦非預期結構(null/非物件),避免解構時拋出未捕捉例外。
+    if (release === null || typeof release !== 'object') {
+      warn('略過格式異常的成品項目')
+      continue
+    }
+
     const { id, tag_name: tag, name } = release
 
     // 要求 id 為正整數(Gitea release id 本即正整數);非整數一律略過,不僅依賴 URL 編碼防護。