diff --git a/app/Http/Controllers/Web/HostController.php b/app/Http/Controllers/Web/HostController.php
index d45fc57..8479209 100644
--- a/app/Http/Controllers/Web/HostController.php
+++ b/app/Http/Controllers/Web/HostController.php
@@ -50,8 +50,12 @@ public function renew(Host $host)
      */
     public function destroy(Host $host): RedirectResponse
     {
+        if ($host->status === 'unavailable') {
+            return back()->with('error', '为了安全起见，此主机只能由我们自动删除。');
+        }
+
         $host->safeDelete();
 
-        return redirect()->route('hosts . index')->with('success', '已添加到删除队列。');
+        return redirect()->route('hosts.index')->with('success', '已添加到删除队列。');
     }
 }