E: Тип 'gpg' не известен в строке 1 в списке источников /etc/apt/sources.list.d/yarn.list

Я пытаюсь установить пряжу на Ubuntu 18.04

но я получаю

E: Type 'gpg' is not known on line 1 in source list /etc/apt/sources.list.d/yarn.list 
E: The list of sources could not be read.

ошибка

Я пробовал эти команды как root и все не работало.

curl -sL https://deb.nodesource.com/setup_11.x | sudo -E bash -
sudo apt-get install -y nodejs
E: Type 'gpg' is not known on line 1 in source list 
/etc/apt/sources.list.d/yarn.list
E: The list of sources could not be read.
E: Type 'gpg' is not known on line 1 in source list 
/etc/apt/sources.list.d/yarn.list
E: The list of sources could not be read.
sudo apt-get update && sudo apt-get install yarn
E: Type 'gpg' is not known on line 1 in source list 
/etc/apt/sources.list.d/yarn.list
E: The list of sources could not be read.

Может ли кто-нибудь помочь мне?