Restoring Backup failed (migrating gitlab from server to docker container

After creating a container , while trying to restore backup it is aborted and gave me this massage:
Restoring repositories …

• root/gitlab … rake aborted!
  storage not found: “external”
  /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:219:in token' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:178:in request_kwargs’
  /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:131:in call' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client/namespace_service.rb:35:in gitaly_client_call’
  /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client/namespace_service.rb:17:in add' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/shell.rb:280:in add_namespace’
  /opt/gitlab/embedded/service/gitlab-rails/app/models/storage/legacy_project.rb:27:in ensure_storage_path_exists' /opt/gitlab/embedded/service/gitlab-rails/app/models/project.rb:58:in ensure_storage_path_exists’
  /opt/gitlab/embedded/service/gitlab-rails/lib/backup/repository.rb:81:in block in restore' /opt/gitlab/embedded/service/gitlab-rails/lib/backup/repository.rb:78:in restore’
  /opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/backup.rake:87:in block (4 levels) in <top (required)>' /opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/backup.rake:60:in block (3 levels) in <top (required)>’
  /opt/gitlab/embedded/bin/bundle:23:in load' /opt/gitlab/embedded/bin/bundle:23:in ’
  Tasks: TOP => gitlab:backup:repo:restore
  (See full trace by running task with --trace)