Migrating Your Data from Drupal 7 to Drupal 10 using the Migrate API: Avoiding entity ID conflicts Migration How To

By default, the Drupal 7 to 10 upgrade path preserves entity IDs. In the previous article, we explained that this would cause problems if content or configuration already exists in the destination Drupal 10 site. Let’s explore this further and evaluate ways to work around the issue.