diff --git a/config/schema/search_api.index.schema.yml b/config/schema/search_api.index.schema.yml
index e942124..4391420 100644
--- a/config/schema/search_api.index.schema.yml
+++ b/config/schema/search_api.index.schema.yml
@@ -87,12 +87,18 @@ search_api.index.*:
       sequence:
         type: plugin.plugin_configuration.search_api_datasource.[%key]
         label: 'Datasource plugin configuration'
-    tracker:
-      type: string
-      label: 'Tracker plugin ID'
-    tracker_config:
-      label: 'Tracker config plugin'
-      type: plugin.plugin_configuration.search_api_tracker.[%parent.tracker]
+    tracker_settings:
+      type: sequence
+      label: 'Tracker settings'
+      sequence:
+        type: mapping
+        label: 'A tracker'
+        mapping:
+          plugin_id:
+            type: string
+            label: 'The plugin ID of the tracker config'
+          settings:
+            type: plugin.plugin_configuration.search_api_tracker.[%parent.plugin_id]
     server:
       type: string
       label: 'Server ID'
diff --git a/config/schema/search_api.tracker.schema.yml b/config/schema/search_api.tracker.schema.yml
index 297badc..1cb3518 100644
--- a/config/schema/search_api.tracker.schema.yml
+++ b/config/schema/search_api.tracker.schema.yml
@@ -1,4 +1,3 @@
-# @todo Update the key when https://www.drupal.org/node/2291073 is fixed.
 plugin.plugin_configuration.search_api_tracker.default:
   type: sequence
   label: 'Entity tracker configuration'
diff --git a/search_api_db/search_api_db_defaults/config/optional/search_api.index.default_index.yml b/search_api_db/search_api_db_defaults/config/optional/search_api.index.default_index.yml
index 06b8a38..365ab47 100644
--- a/search_api_db/search_api_db_defaults/config/optional/search_api.index.default_index.yml
+++ b/search_api_db/search_api_db_defaults/config/optional/search_api.index.default_index.yml
@@ -209,8 +209,10 @@ datasource_configs:
     bundles:
       article: '0'
       page: '0'
-tracker: default
-tracker_config: {  }
+tracker_settings:
+  'default':
+    plugin_id: default
+    settings: {  }
 server: default_server
 status: true
 langcode: en
diff --git a/src/Entity/Index.php b/src/Entity/Index.php
index 7011ab8..ee3dbba 100644
--- a/src/Entity/Index.php
+++ b/src/Entity/Index.php
@@ -62,8 +62,7 @@ use Drupal\views\Views;
  *     "options",
  *     "datasources",
  *     "datasource_configs",
- *     "tracker",
- *     "tracker_config",
+ *     "tracker_settings",
  *     "server",
  *   },
  *   links = {
@@ -150,18 +149,11 @@ class Index extends ConfigEntityBase implements IndexInterface {
   protected $datasourcePlugins;
 
   /**
-   * The tracker plugin ID.
-   *
-   * @var string
-   */
-  protected $tracker = 'default';
-
-  /**
-   * The tracker plugin configuration.
+   * The tracker settings
    *
    * @var array
    */
-  protected $tracker_config = array();
+  protected $tracker_settings = array('default' => array('plugin_id' => 'default', 'settings' => array()));
 
   /**
    * The tracker plugin instance.
@@ -368,7 +360,12 @@ class Index extends ConfigEntityBase implements IndexInterface {
    * {@inheritdoc}
    */
   public function getTrackerId() {
-    return $this->tracker;
+    if (is_null($this->tracker_settings)) {
+      return 'default';
+    }
+
+    $plugins = array_keys($this->tracker_settings);
+    return $this->tracker_settings[$plugins[0]]['plugin_id'];
   }
 
   /**
@@ -376,9 +373,16 @@ class Index extends ConfigEntityBase implements IndexInterface {
    */
   public function getTracker() {
     if (!$this->trackerPlugin) {
-      $tracker_plugin_configuration = array('index' => $this) + $this->tracker_config;
+
+      if (is_null($this->tracker_settings)) {
+        $tracker_plugin_configuration = array('index' => $this);
+      } else {
+        $plugins = array_keys($this->tracker_settings);
+        $tracker_plugin_configuration = array('index' => $this) + $this->tracker_settings[$plugins[0]]['settings'];
+      }
+
       if (!($this->trackerPlugin = \Drupal::service('plugin.manager.search_api.tracker')->createInstance($this->getTrackerId(), $tracker_plugin_configuration))) {
-        $args['@tracker'] = $this->tracker;
+        $args['@tracker'] = $this->getTrackerId();
         $args['%index'] = $this->label();
         throw new SearchApiException(new FormattableMarkup('The tracker with ID "@tracker" could not be retrieved for index %index.', $args));
       }
@@ -1215,7 +1219,7 @@ class Index extends ConfigEntityBase implements IndexInterface {
    *   The previous version of the index.
    */
   protected function reactToTrackerSwitch(IndexInterface $original) {
-    if ($this->tracker != $original->getTrackerId()) {
+    if ($this->getTrackerId() != $original->getTrackerId()) {
       $index_task_manager = \Drupal::getContainer()->get('search_api.index_task_manager');
       if ($original->hasValidTracker()) {
         $index_task_manager->stopTracking($this);
@@ -1520,8 +1524,13 @@ class Index extends ConfigEntityBase implements IndexInterface {
     $this->datasource_configs = array_intersect_key($this->datasource_configs, $all_plugins['datasources']);
     // There always needs to be a tracker.
     if (empty($all_plugins['tracker'])) {
-      $this->tracker = \Drupal::config('search_api.settings')->get('default_tracker');
-      $this->tracker_config = array();
+      $default_tracker_id = \Drupal::config('search_api.settings')->get('default_tracker');
+      $this->tracker_settings = array(
+        $default_tracker_id = array(
+          'plugin_id' => $default_tracker_id,
+          'settings' => array(),
+        )
+      );
     }
     // There also always needs to be a datasource, but here we have no easy way
     // out – if we had to remove all datasources, the operation fails. Return
@@ -1541,7 +1550,7 @@ class Index extends ConfigEntityBase implements IndexInterface {
             $this->datasource_configs[$plugin_id] = $plugin_config;
             break;
           case 'tracker':
-            $this->tracker_config = $plugin_config;
+            $this->tracker_settings[$plugin_id]['settings'] = $plugin_config;
             break;
         }
       }
diff --git a/src/Form/IndexForm.php b/src/Form/IndexForm.php
index 2bfca64..069b01e 100644
--- a/src/Form/IndexForm.php
+++ b/src/Form/IndexForm.php
@@ -552,7 +552,12 @@ class IndexForm extends EntityForm {
 
     $tracker_form_state = new SubFormState($form_state, array('tracker_config'));
     $tracker->submitConfigurationForm($form['tracker_config'], $tracker_form_state);
-    $index->set('tracker_config', $tracker->getConfiguration());
+    $index->set('tracker_settings', array(
+      $tracker_id => array(
+        'plugin_id' => $tracker_id,
+        'settings' => $tracker->getConfiguration(),
+      )
+    ));
   }
 
   /**
diff --git a/tests/search_api_test_db/config/install/search_api.index.database_search_index.yml b/tests/search_api_test_db/config/install/search_api.index.database_search_index.yml
index 8dc3b58..ceb0f9b 100644
--- a/tests/search_api_test_db/config/install/search_api.index.database_search_index.yml
+++ b/tests/search_api_test_db/config/install/search_api.index.database_search_index.yml
@@ -57,8 +57,10 @@ options:
 datasources:
   - 'entity:entity_test'
 datasource_configs: {  }
-tracker: default
-tracker_config: {  }
+tracker_settings:
+  'default':
+    plugin_id: default
+    settings: {  }
 server: database_search_server
 status: true
 langcode: en
diff --git a/tests/src/Kernel/DependencyRemovalTest.php b/tests/src/Kernel/DependencyRemovalTest.php
index 61a7da3..dffe686 100644
--- a/tests/src/Kernel/DependencyRemovalTest.php
+++ b/tests/src/Kernel/DependencyRemovalTest.php
@@ -57,7 +57,12 @@ class DependencyRemovalTest extends KernelTestBase {
     $this->index = Index::create(array(
       'id' => 'test_index',
       'name' => 'Test index',
-      'tracker' => 'default',
+      'tracker_settings' => array(
+        'default' => array(
+          'plugin_id' => 'default',
+          'settings' => array()
+        )
+      ),
       'datasources' => array(
         'entity:user',
       ),
@@ -336,11 +341,15 @@ class DependencyRemovalTest extends KernelTestBase {
     // server.
     $dependency_key = $this->dependency->getConfigDependencyKey();
     $dependency_name = $this->dependency->getConfigDependencyName();
-    $this->index->set('tracker', 'search_api_test_dependencies');
-    $this->index->set('tracker_config', array(
-      $dependency_key => array(
-        $dependency_name,
-      ),
+    $this->index->set('tracker_settings', array(
+      'search_api_test_dependencies' => array(
+        'plugin_id' => 'search_api_test_dependencies',
+        'settings' => array(
+          $dependency_key => array(
+            $dependency_name,
+          ),
+        )
+      )
     ));
     $this->index->save();
 
@@ -375,8 +384,10 @@ class DependencyRemovalTest extends KernelTestBase {
 
     // Depending on whether the plugin should have removed the dependency or
     // not, make sure the right action was taken.
-    $tracker = $this->index->get('tracker');
-    $tracker_config = $this->index->get('tracker_config');
+    $config = $this->index->get('tracker_settings');
+    $plugins = array_keys($config);
+    $tracker = $config[$plugins[0]]['plugin_id'];
+    $tracker_config = $config[$plugins[0]]['settings'];
     if ($remove_dependency) {
       $this->assertEquals('search_api_test_dependencies', $tracker, 'Tracker not reset');
       $this->assertEmpty($tracker_config, 'Tracker settings adapted');