diff -u b/lib/Drupal/pgn/Plugin/Core/Entity/PgnGame.php b/lib/Drupal/pgn/Plugin/Core/Entity/PgnGame.php
--- b/lib/Drupal/pgn/Plugin/Core/Entity/PgnGame.php
+++ b/lib/Drupal/pgn/Plugin/Core/Entity/PgnGame.php
@@ -20,32 +20,12 @@
  *   label = @Translation("PGN game entity"),
  *   module = "pgn",
  *   render_controller_class = "Drupal\Core\Entity\EntityRenderController",
- *   base_table = "pgn_game",
- *   data_table = "pgn_game_property_data",
  *   fieldable = TRUE,
- *   entity_keys = {
- *     "id" = "id",
- *     "uuid" = "uuid"
- *   },
  * )
  */
 class PgnGame extends EntityNG implements ContentEntityInterface {
 
   /**
-   * The entity ID.
-   *
-   * @var \Drupal\Core\Entity\Field\FieldInterface
-   */
-  public $id;
-
-  /**
-   * The entity UUID.
-   *
-   * @var \Drupal\Core\Entity\Field\FieldInterface
-   */
-  public $uuid;
-
-  /**
    * The event tag of the PGN game entity.
    *
    * @var \Drupal\Core\Entity\Field\FieldInterface
@@ -108,8 +88,6 @@
     parent::init();
 
     // We unset all defined properties, so magic getters apply.
-    unset($this->id);
-    unset($this->uuid);
     unset($this->event);
     unset($this->site);
     unset($this->date);
@@ -121,6 +99,13 @@
   }
 
   /**
+   * Implements \Drupal\Core\Entity\EntityInterface::id().
+   */
+  public function id() {
+    return NULL;
+  }
+
+  /**
    * Overrides \Drupal\entity\Entity::label().
    */
   public function label($langcode = LANGUAGE_DEFAULT) {