Error update Audacity {Resolvido}

Instalei o Audacity normalmente, ele funciona legalzinho OBS: ate agora nao deu nenhum bug.
Mas quando vou no terminal de dou um UPDATE aparece isso:
(resumido)

Ign:15 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 Packages
Ign:16 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main i386 Packages
Ign:17 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt_BR
Ign:19 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt
Ign:20 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-en
Ign:21 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:22 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main DEP-11 64x64 Icons
Ign:15 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 Packages
Ign:16 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main i386 Packages
Ign:17 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt_BR
Ign:19 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt
Ign:20 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-en
Ign:21 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:22 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main DEP-11 64x64 Icons
Ign:15 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 Packages
Ign:16 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main i386 Packages
Ign:17 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt_BR
Ign:19 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt
Ign:20 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-en
Ign:21 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:22 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main DEP-11 64x64 Icons
Err:15 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 Packages
404 Not Found
Ign:16 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main i386 Packages
Ign:17 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt_BR
Ign:19 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-pt
Ign:20 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main Translation-en
Ign:21 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:22 http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial/main DEP-11 64x64 Icons
Lendo listas de pacotes... Pronto
W: The repository 'http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/ubuntuhandbook1/audacity/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Falhou o download de alguns ficheiros de índice. Foram ignorados ou os antigos foram usados em seu lugar.

Notem que o Ign:15 aparece la em sima e depois embaixo como erro!!!
O que devo fazer?

programas-atualizações >> outros-programas >> remova todos ppa problematicas >> atualize novamente

valew cara eu removi o repositório, dai procurei um outro e substitui :p