Error when pinning a message by the bot, what should I do?

Question

Python

When a message is pinned by the bot, an error occurs:
Traceback (most recent call last):
File "", line 299, in
File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3. 8/site-packages/vk_api/vk_api.py", line 646, in method
raise error
vk_api.exceptions.ApiError: [925] You are not admin of this chat

Granted admin rights to the bot, code:

if textt[0] == ".pin":
    id3 = event.peer_id
    from_id_ = vk_session.method('messages.getById',{'message_ids':[event.message_id]})['items'][0]['reply_message']['from_id']
    vk_session.method('messages.pin', {'peer_id' : id3, 'message_id' : from_id_})
    sender(id3, "Сообщение закреплено!")