Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / modules / workspaces / config / install / core.entity_form_mode.workspace.deploy.yml

langcode: en
status: true
dependencies:
  module:
    - workspaces
id: workspace.deploy
label: Deploy
targetEntityType: workspace
cache: true