Target CNF (stable/cnf/Commands-arm64) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60 에러

ubuntu 패키지의 설치중 에러가 뜨는 경우가 있는데요. W: Target CNF (stable/cnf/Commands-arm64) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60 W: Target CNF (stable/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60 W: Target Packages (stable/binary-arm64/Packages) is configured multiple times in /etc/apt/sources.list:60 and ..