text: ALTER TABLE version_owner_actions
  ALTER COLUMN user_id
  DROP NOT NULL
  ;
  
  ALTER TABLE version_owner_actions
  ALTER COLUMN version_id
  DROP NOT NULL
  ;
  
  ALTER TABLE version_owner_actions
  RENAME COLUMN user_id TO owner_id
  ;
  
  ALTER TABLE version_owner_actions
  RENAME COLUMN api_token_id TO owner_token_id
  ;
  