diff --git a/plugins/genshin/sign.py b/plugins/genshin/sign.py
index 3e92c47f..2f587dd1 100644
--- a/plugins/genshin/sign.py
+++ b/plugins/genshin/sign.py
@@ -171,7 +171,7 @@ class Sign(Plugin, BasePlugin):
     @staticmethod
     async def gen_challenge_header(uid: int, validate: str) -> Optional[Dict]:
         challenge = await SignRedis.get(uid)
-        if not challenge:
+        if not challenge or not validate:
             return
         return {
             "x-rpc-challenge": challenge.decode("utf-8"),
@@ -213,14 +213,6 @@ class Sign(Plugin, BasePlugin):
                         request_daily_reward.get("gt", ""),
                         request_daily_reward.get("challenge", ""),
                     )
-                    if not headers:
-                        button = await Sign.gen_challenge_button(
-                            client.uid,
-                            request_daily_reward.get("gt", ""),
-                            request_daily_reward.get("challenge", ""),
-                        )
-                        logger.warning(f"UID {client.uid} 签到失败，触发验证码风控")
-                        return f"UID {client.uid} 签到失败，触发验证码风控，请尝试重新签到。", button
                     request_daily_reward = await client.request_daily_reward(
                         "sign",
                         method="POST",
diff --git a/plugins/system/start.py b/plugins/system/start.py
index f5647e5e..659a90a2 100644
--- a/plugins/system/start.py
+++ b/plugins/system/start.py
@@ -48,7 +48,7 @@ class StartPlugin(Plugin):
         with contextlib.suppress(UserNotFoundError, CookiesNotFoundError):
             client = await get_genshin_client(update.effective_user.id)
             await update.effective_message.reply_chat_action(ChatAction.TYPING)
-            headers = await Sign.gen_challenge_header(update.effective_user.id, validate)
+            headers = await Sign.gen_challenge_header(client.uid, validate)
             if not headers:
                 await update.effective_message.reply_text("验证请求已过期。", allow_sending_without_reply=True)
                 return