In AbstractMySQLDriver.php line 69:

  An exception occurred while executing '            INSERT INTO mainshopbase.shop_activations (
                id,
                user_id,
                code,
                completed_at,
                created_at
              )
                SELECT
                  id,
                  user_id,
                  code,
                  completed_at,
                  created_at
                FROM fwldshopbase.lshop_activations;':

  SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`mainshopbase`.`shop_activations`, CONSTRAINT `FK_704B5E4A76ED395` FOREIGN KEY (`u
  ser_id`) REFERENCES `shop_users` (`id`))


In PDOStatement.php line 144:

  SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`mainshopbase`.`shop_activations`, CONSTRAINT `FK_704B5E4A76ED395` FOREIGN KEY (`u
  ser_id`) REFERENCES `shop_users` (`id`))


In PDOStatement.php line 142:

  SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`mainshopbase`.`shop_activations`, CONSTRAINT `FK_704B5E4A76ED395` FOREIGN KEY (`u
  ser_id`) REFERENCES `shop_users` (`id`))