From 7750c9ff2f1e09083d6c11600143b8a825ae1b70 Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Sat, 21 Jul 2018 13:24:32 +0200
Subject: [PATCH] Make sure to not add callbacks from buttons= twice

---
 telethon/client/buttons.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/telethon/client/buttons.py b/telethon/client/buttons.py
index 7e64c164..210c17f5 100644
--- a/telethon/client/buttons.py
+++ b/telethon/client/buttons.py
@@ -31,6 +31,9 @@ class ButtonMethods(UpdateMethods):
                 is_normal |= not inline
                 if isinstance(button, custom.Button):
                     if button.callback:
+                        self.remove_event_handler(
+                            button.callback, events.CallbackQuery)
+
                         self.add_event_handler(
                             button.callback,
                             events.CallbackQuery(data=button.data)