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

[yaffs-website] / web / core / profiles / demo_umami / config / install / field.storage.block_content.field_summary.yml

langcode: en
status: true
dependencies:
  module:
    - block_content
id: block_content.field_summary
field_name: field_summary
entity_type: block_content
type: string_long
settings:
  case_sensitive: false
module: core
locked: false
cardinality: 1
translatable: true
indexes: {  }
persist_with_no_fields: false
custom_storage: false