Overrides Drupal\Core\Entity\DatabaseStorageController::save().
Overrides DatabaseStorageController::save
public function save(EntityInterface $entity) {
if (empty($entity->uid)) {
$entity->uid = db_next_id(db_query('SELECT MAX(uid) FROM {users}')
->fetchField());
$entity
->enforceIsNew();
}
parent::save($entity);
}