j’ai donc désinstallé Mastodon via la webui
et voulu reinstallé en CLI 
:
sudo yunohost app install https://github.com/YunoHost-Apps/mastodon_ynh.git
Choose the Mastodon administrator (must be an existing YunoHost user): vincentux
Enter password of this administrator ≥ 8 character:
Choose the application language [en_EN | fr_FR] (default: fr_FR):
Warning: Warning: apt-key output should not be parsed (stdout is not a terminal)
Warning: Warning: apt-key output should not be parsed (stdout is not a terminal)
Warning: adduser: Warning: The home directory `/var/www/mastodon' does not belong to the user you are currently creating.
Warning: Downloading ruby-2.5.1.tar.bz2...
Warning: -> https://cache.ruby-lang.org/pub/ruby/2.5/ruby-2.5.1.tar.bz2
Warning: Installing ruby-2.5.1...
Warning: Installed ruby-2.5.1 to /var/www/mastodon/.rbenv/versions/2.5.1
Warning:
Warning: tr: write error: Broken pipe
Warning: tr: write error: Broken pipe
Warning: error An unexpected error occurred: "EACCES: permission denied, unlink '/var/www/mastodon/live/node_modules/.yarn-integrity'".
Warning: rails aborted!
Warning: StandardError: An error has occurred, all later migrations canceled:
Warning:
Warning: Index name 'index_statuses_20180106' on table 'statuses' already exists
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:1169:in `add_index_options'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/postgresql/schema_statements.rb:465:in `add_index'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:871:in `block in method_missing'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:840:in `block in say_with_time'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:840:in `say_with_time'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:860:in `method_missing'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/migration.rb:75:in `method_missing'
Warning: /var/www/mastodon/live/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb:8:in `block in change'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/migration.rb:6:in `safety_assured'
Warning: /var/www/mastodon/live/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb:7:in `change'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:814:in `exec_migration'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:798:in `block (2 levels) in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:797:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:414:in `with_connection'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:796:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/migration.rb:13:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/strategy.rb:70:in `wrap'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy.rb:201:in `strategy'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:977:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1292:in `block in execute_migration_in_transaction'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1345:in `ddl_transaction'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1291:in `execute_migration_in_transaction'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1263:in `block in migrate_without_lock'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1262:in `each'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1262:in `migrate_without_lock'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1210:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1363:in `with_advisory_lock'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1210:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/strategy.rb:70:in `wrap'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy.rb:201:in `strategy'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1036:in `up'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1011:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/tasks/database_tasks.rb:172:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/database_tasks.rb:4:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/railties/databases.rake:60:in `block (2 levels) in <top (required)>'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/commands/rake/rake_command.rb:23:in `block in perform'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/commands/rake/rake_command.rb:20:in `perform'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/command.rb:48:in `invoke'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/commands.rb:18:in `<top (required)>'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `block in require'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:249:in `load_dependency'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `require'
Warning: bin/rails:4:in `<main>'
Warning:
Warning: Caused by:
Warning: ArgumentError: Index name 'index_statuses_20180106' on table 'statuses' already exists
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:1169:in `add_index_options'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/postgresql/schema_statements.rb:465:in `add_index'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:871:in `block in method_missing'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:840:in `block in say_with_time'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:840:in `say_with_time'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:860:in `method_missing'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/migration.rb:75:in `method_missing'
Warning: /var/www/mastodon/live/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb:8:in `block in change'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/migration.rb:6:in `safety_assured'
Warning: /var/www/mastodon/live/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb:7:in `change'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:814:in `exec_migration'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:798:in `block (2 levels) in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:797:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:414:in `with_connection'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:796:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/migration.rb:13:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/strategy.rb:70:in `wrap'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy.rb:201:in `strategy'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:977:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1292:in `block in execute_migration_in_transaction'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1345:in `ddl_transaction'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1291:in `execute_migration_in_transaction'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1263:in `block in migrate_without_lock'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1262:in `each'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1262:in `migrate_without_lock'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1210:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1363:in `with_advisory_lock'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1210:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `block in migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/strategy.rb:70:in `wrap'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy.rb:201:in `strategy'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/chewy-5.0.0/lib/chewy/railtie.rb:37:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1036:in `up'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/migration.rb:1011:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/tasks/database_tasks.rb:172:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/strong_migrations-0.2.2/lib/strong_migrations/database_tasks.rb:4:in `migrate'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.0/lib/active_record/railties/databases.rake:60:in `block (2 levels) in <top (required)>'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/commands/rake/rake_command.rb:23:in `block in perform'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/commands/rake/rake_command.rb:20:in `perform'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/command.rb:48:in `invoke'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/railties-5.2.0/lib/rails/commands.rb:18:in `<top (required)>'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `block in require'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:249:in `load_dependency'
Warning: /var/www/mastodon/live/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.0/lib/active_support/dependencies.rb:283:in `require'
Warning: bin/rails:4:in `<main>'
Warning: Tasks: TOP => db:migrate
Warning: (See full trace by running task with --trace)
Warning: error An unexpected error occurred: "EACCES: permission denied, unlink '/var/www/mastodon/live/node_modules/.yarn-integrity'".
Warning: I, [2018-07-23T10:51:17.569651 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/doorkeeper/admin/application-50d68ad91b15067c63771e4811d971d7a56406c472a878021d1fb95d066efd8d.css
Warning: I, [2018-07-23T10:51:17.570237 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/doorkeeper/admin/application-50d68ad91b15067c63771e4811d971d7a56406c472a878021d1fb95d066efd8d.css.gz
Warning: I, [2018-07-23T10:51:17.593472 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/doorkeeper/application-29873392fba1f6a4fd5359214f854d900e24920096164f6e5343dbc0de69df0d.css
Warning: I, [2018-07-23T10:51:17.594584 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/doorkeeper/application-29873392fba1f6a4fd5359214f854d900e24920096164f6e5343dbc0de69df0d.css.gz
Warning: I, [2018-07-23T10:51:17.606278 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/pghero/favicon-db10337a56c45eb43c22ff5019546b520fa22c7281d4d385f235cbca67ed26bb.png
Warning: I, [2018-07-23T10:51:18.059748 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/pghero/application-b6568ba483c03c4fdcd8edd641f3b341ac0314ba01ab186645b8fc231cdff02e.js
Warning: I, [2018-07-23T10:51:18.060046 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/pghero/application-b6568ba483c03c4fdcd8edd641f3b341ac0314ba01ab186645b8fc231cdff02e.js.gz
Warning: I, [2018-07-23T10:51:18.096804 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/pghero/application-d7ee8e7dc0785de97337625e0f1030e1a892327ef4e72a48043ce09fd964874d.css
Warning: I, [2018-07-23T10:51:18.097132 #24450] INFO -- : Writing /var/www/mastodon/live/public/assets/pghero/application-d7ee8e7dc0785de97337625e0f1030e1a892327ef4e72a48043ce09fd964874d.css.gz
Warning: Created symlink /etc/systemd/system/multi-user.target.wants/mastodon-web.service → /etc/systemd/system/mastodon-web.service.
Warning: Created symlink /etc/systemd/system/multi-user.target.wants/mastodon-sidekiq.service → /etc/systemd/system/mastodon-sidekiq.service.
Warning: Created symlink /etc/systemd/system/multi-user.target.wants/mastodon-streaming.service → /etc/systemd/system/mastodon-streaming.service.
Warning: vincentux@vincentux.fr not found
Warning: !!
Warning: mastodon's script has encountered an error. Its execution was cancelled.
Warning: !!
Warning:
Warning: Removed /etc/systemd/system/multi-user.target.wants/mastodon-web.service.
Warning: Removed /etc/systemd/system/multi-user.target.wants/mastodon-sidekiq.service.
Warning: Removed /etc/systemd/system/multi-user.target.wants/mastodon-streaming.service.
Warning: /etc/cron.d/mastodon wasn't deleted because it doesn't exist.
Success! The SSOwat configuration has been generated
Error: Installation failed