Malformed stanza 1

[ali_ataei]

hi im i have problem with my apt update command when i use sudo apt update it's says

sudo apt-get update
E: Malformed stanza 1 in source list /etc/apt/sources.list.d/ubuntu.sources (type)
E: The list of sources could not be read.

and here is my source list and i cant undrestand wich part have problem

[pavlos_kairis]

ubuntu.sources is a diff format than the usual sources.list (what you show).

cd /etc/apt/
sudo mv sources.list.d/ubuntu.sources sources.list
sudo apt update (should be clean)

(rename/move the file one level up).