从 AWS 迁移到 DigitalOcean 时备份失败。我已尝试命令行方法和 GUI 方法，但两者均失败。我不知道下一步该做什么，需要帮助。
ALTER TABLE
ALTER TABLE
ALTER TABLE
正在迁移数据库...
正在重新连接数据库...
正在重新加载站点设置...
正在为非工作人员用户禁用外发邮件...
正在禁用只读模式...
正在清除分类缓存...
正在清除表情符号缓存...
正在清除主题缓存
正在重新映射上传文件...
正在恢复上传文件，这可能需要一些时间...
异常：请提供以下环境变量：
- DISCOURSE_S3_BUCKET
- DISCOURSE_S3_REGION
以及以下任一选项：
- DISCOURSE_S3_ACCESS_KEY_ID
- DISCOURSE_S3_SECRET_ACCESS_KEY
或
- DISCOURSE_S3_USE_IAM_PROFILE
/var/www/discourse/lib/file_store/to_s3_migration.rb:36:in `s3_options_from_env'
/var/www/discourse/lib/file_store/s3_store.rb:201:in `copy_from'
/var/www/discourse/lib/backup_restore/uploads_restorer.rb:48:in `restore_uploads'
/var/www/discourse/lib/backup_restore/uploads_restorer.rb:30:in `restore'
/var/www/discourse/lib/backup_restore/restorer.rb:59:in `run'
script/discourse:143:in `restore'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/base.rb:485:in `start'
script/discourse:284:in `<top (required)>'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `load'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `kernel_load'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:28:in `run'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli.rb:476:in `exec'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor.rb:399:in `dispatch'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli.rb:30:in `dispatch'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/base.rb:476:in `start'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/cli.rb:24:in `start'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/exe/bundle:46:in `block in <top (required)>'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/friendly_errors.rb:123:in `with_friendly_errors'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/exe/bundle:34:in `<top (required)>'
/usr/local/bin/bundle:23:in `load'
/usr/local/bin/bundle:23:in `<main>'
正在尝试回滚...
正在回滚...
正在清理临时文件...
正在从 discourse_functions 架构中删除函数...
正在删除临时目录 '/var/www/discourse/tmp/restores/default/2020-04-14-161013'...
正在取消暂停 sidekiq...
正在标记恢复为已完成...
正在通知“system”恢复结束...
完成！
[失败]
恢复完成。
以下所有信息已在新安装中提供。
- DISCOURSE_S3_BUCKET
- DISCOURSE_S3_REGION
- DISCOURSE_S3_ACCESS_KEY_ID
- DISCOURSE_S3_SECRET_ACCESS_KEY