I have got existing Drpal 8.5 site with hundreds of nodes. With migrate, if i try to upgrade, new nodes are rather created. Node have a field which is being used as key however that seem to be not working. It seems that node are only updated if their record present in migrate_map_xyz. Any suggestions?
Updating existing content was possible by changing the default behaviour of a migration with the system of record concept in Drupal 7.
In Drupal 8 this concept has been revised & is available with the
overwrite_properties option in the destination of the migration YAML:
# define the entity properties that are to be updated.
Answered by baikho on December 3, 2020
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