diff --git a/src/Plugin/facets/processor/BooleanItemProcessor.php b/src/Plugin/facets/processor/BooleanItemProcessor.php
index db10e9d..0a35ffb 100644
--- a/src/Plugin/facets/processor/BooleanItemProcessor.php
+++ b/src/Plugin/facets/processor/BooleanItemProcessor.php
@@ -6,6 +6,7 @@
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\facets\Processor\BuildProcessorInterface;
 use Drupal\facets\Processor\ProcessorPluginBase;
+use Drupal\search_api\Processor\ProcessorPropertyInterface;
 
 /**
  * Provides a processor for boolean labels.
@@ -89,6 +90,10 @@ public function defaultConfiguration() {
    */
   public function supportsFacet(FacetInterface $facet) {
     $data_definition = $facet->getDataDefinition();
+    if ($data_definition instanceof ProcessorPropertyInterface) {
+      return FALSE;
+    }
+
     $property_definitions = $data_definition->getPropertyDefinitions();
     foreach ($property_definitions as $definition) {
       if ($definition->getDataType() == "boolean") {
diff --git a/src/Plugin/facets/processor/TranslateEntityProcessor.php b/src/Plugin/facets/processor/TranslateEntityProcessor.php
index b7402b8..771c75a 100644
--- a/src/Plugin/facets/processor/TranslateEntityProcessor.php
+++ b/src/Plugin/facets/processor/TranslateEntityProcessor.php
@@ -11,6 +11,7 @@
 use Drupal\facets\FacetInterface;
 use Drupal\facets\Processor\BuildProcessorInterface;
 use Drupal\facets\Processor\ProcessorPluginBase;
+use Drupal\search_api\Processor\ProcessorPropertyInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -141,6 +142,10 @@ public function build(FacetInterface $facet, array $results) {
    */
   public function supportsFacet(FacetInterface $facet) {
     $data_definition = $facet->getDataDefinition();
+    if ($data_definition instanceof ProcessorPropertyInterface) {
+      return FALSE;
+    }
+
     $property_definitions = $data_definition->getPropertyDefinitions();
     foreach ($property_definitions as $definition) {
       if ($definition instanceof DataReferenceDefinitionInterface && $definition->getDataType() === 'entity_reference') {
diff --git a/src/Plugin/facets/processor/UidToUserNameCallbackProcessor.php b/src/Plugin/facets/processor/UidToUserNameCallbackProcessor.php
index 2f89130..490f9f9 100644
--- a/src/Plugin/facets/processor/UidToUserNameCallbackProcessor.php
+++ b/src/Plugin/facets/processor/UidToUserNameCallbackProcessor.php
@@ -6,6 +6,7 @@
 use Drupal\facets\FacetInterface;
 use Drupal\facets\Processor\BuildProcessorInterface;
 use Drupal\facets\Processor\ProcessorPluginBase;
+use Drupal\search_api\Processor\ProcessorPropertyInterface;
 use Drupal\user\Entity\User;
 
 /**
@@ -45,6 +46,10 @@ public function build(FacetInterface $facet, array $results) {
    */
   public function supportsFacet(FacetInterface $facet) {
     $data_definition = $facet->getDataDefinition();
+    if ($data_definition instanceof ProcessorPropertyInterface) {
+      return FALSE;
+    }
+
     $property_definitions = $data_definition->getPropertyDefinitions();
     foreach ($property_definitions as $definition) {
       if (
diff --git a/tests/src/Functional/AggregatedFieldTest.php b/tests/src/Functional/AggregatedFieldTest.php
index e728bd3..c0e2c8e 100644
--- a/tests/src/Functional/AggregatedFieldTest.php
+++ b/tests/src/Functional/AggregatedFieldTest.php
@@ -4,7 +4,6 @@
 
 use Drupal\entity_test\Entity\EntityTestMulRevChanged;
 use Drupal\search_api\Entity\Index;
-use Drupal\search_api\Utility\FieldsHelper;
 use Drupal\search_api\Utility\Utility;
 use Drupal\user\Entity\User;
 
@@ -56,18 +55,18 @@ public function setUp() {
     $index = Index::load($this->indexId);
     $index->addDatasource($plugin_creation_helper->createDatasourcePlugin($index, 'entity:user'));
     $index->addProcessor($plugin_creation_helper->createProcessorPlugin($index, 'aggregated_field'));
-    $field = $fields_helper->createField($index, 'aggregated_field', [
-      'property_path' => 'aggregated_field',
-      'configuration' => [
-        'type' => 'union',
-        'fields' => [
-          Utility::createCombinedId('entity:entity_test_mulrev_changed', 'name'),
-          Utility::createCombinedId('entity:user', 'name'),
-        ],
+    $field = $fields_helper->createField($index, 'aggregated_field', ['property_path' => 'aggregated_field']);
+    $field->setConfiguration([
+      'type' => 'union',
+      'fields' => [
+        Utility::createCombinedId('entity:entity_test_mulrev_changed', 'name'),
+        Utility::createCombinedId('entity:user', 'name'),
       ],
     ]);
+    $field->setDataDefinition();
     $index->addField($field);
     $index->save();
+    $this->drupalGet('admin/config/search/search-api/index/');
 
     $this->indexItems($this->indexId);
   }