diff --git a/pages/api/record.ts b/pages/api/record.ts
index 054eab1..bfce8ac 100644
--- a/pages/api/record.ts
+++ b/pages/api/record.ts
@@ -12,7 +12,7 @@ export default function handler(req: NextApiRequest, res: NextApiResponse) {
       });
       return;
     }
-    const json = JSON.parse(req.body);
+    const json = req.body;
     console.log("request", json);
     if (json.checked) {
       let count = 0;
@@ -36,6 +36,13 @@ export default function handler(req: NextApiRequest, res: NextApiResponse) {
       }
       store[json.name] = json.user;
     } else {
+      // check whether the request name match the taken name
+      if (store[json.name] !== json.user) {
+        res.status(403).json({
+          error: `失败：您未选择到当前位置`,
+        })
+        return;
+      }
       delete store[json.name];
     }
   }