delivery-8.x-1.x-dev/modules/delivery_update/delivery_update.install

<?php

function deliver_update_post_update_migrate() {
  \Drupal::database()->query('UPDATE {workspace} set parent = parent_workspace')->execute();
  /** @var \Drupal\workspaces\WorkspaceManagerInterface $workspacesManager */
  $workspacesManager = \Drupal::service('workspaces.manager');

  foreach (\Drupal::entityTypeManager()->getDefinitions() as $entityType) {
    if ($workspacesManager->isEntityTypeSupported($entityType)) {
      $table = $entityType->getRevisionDataTable();
      \Drupal::database()->query('UPDATE {' . $table . '} SET revision_parent = revision_parent__target_id, revision_merge_parent = revision_parent__merge_target_id')->execute();
    }
  }
}

/**
 * Implements hook_module_preinstall().
 */
function delivery_update_module_preinstall($module) {
  if ($module !== 'revision_tree') {
    return;
  }

  // Clear plugin manager caches so the new 'revision_tree' field type is
  // available below.
  \Drupal::getContainer()->get('plugin.cache_clearer')->clearCachedDefinitions();
}