upd

bot/app/bot.py

@@ -145,7 +145,7 @@ async def setup(msg: Message):
 async def register_group_member(call: types.CallbackQuery):
     new = False
     get_user(call.from_user)
-    group = get_group(msg.chat)
+    group = get_group(call.message.chat)
     if (
         group_member := session.query(GroupMember)
         .filter(
@@ -164,10 +164,10 @@ async def register_group_member(call: types.CallbackQuery):
         new = True
     session.commit()
     await bot.edit_message_text(
-        chat_id=msg.chat.id, 
+        chat_id=call.message.chat.id, 
         text=get_setup_text(group),
         reply_markup=keyboards.setup(),
-        message_id=msg.id,
+        message_id=call.message.id,
         parse_mode="html",
     )
     await bot.answer_callback_query(