diff --git a/tasks/channel_history.py b/tasks/channel_history.py
index 3f498ce..dfab212 100644
--- a/tasks/channel_history.py
+++ b/tasks/channel_history.py
@@ -65,8 +65,6 @@ class ChannelHistoryReadTask(AsyncTask):
     webhook: str
     http: aiohttp.ClientSession
 
-    seq_no: int = 0  # global mutable
-
     def setup(self, client: pyrogram.Client, channel: pyrogram.Chat, webhook: str):
         self.client = client
         self.channel = channel