diff --git a/src/Plugin/monitoring/SensorPlugin/ContentEntityAggregatorSensorPlugin.php b/src/Plugin/monitoring/SensorPlugin/ContentEntityAggregatorSensorPlugin.php
index 3ff4ccd..3edc634 100644
--- a/src/Plugin/monitoring/SensorPlugin/ContentEntityAggregatorSensorPlugin.php
+++ b/src/Plugin/monitoring/SensorPlugin/ContentEntityAggregatorSensorPlugin.php
@@ -250,7 +250,7 @@ class ContentEntityAggregatorSensorPlugin extends DatabaseAggregatorSensorPlugin
               $row[] = $value ? \Drupal::service('renderer')->renderPlain($value) : $entity->$field->$property;
             }
             else {
-              $row[] = t('field %field is invalid', ['%field' => $field]);
+              $row[] = '';
             }
             break;
         }
diff --git a/src/Tests/MonitoringCoreWebTest.php b/src/Tests/MonitoringCoreWebTest.php
index 825b801..cd12da8 100644
--- a/src/Tests/MonitoringCoreWebTest.php
+++ b/src/Tests/MonitoringCoreWebTest.php
@@ -449,7 +449,6 @@ class MonitoringCoreWebTest extends MonitoringTestBase {
     $this->assertText(\Drupal::service('date.formatter')->format($node1->getRevisionCreationTime(), 'short'));
     $this->assertText(\Drupal::service('date.formatter')->format($node2->getRevisionCreationTime(), 'short'));
     $this->assertText(\Drupal::service('date.formatter')->format($node3->getRevisionCreationTime(), 'short'));
-    $this->assertText('field test_wrong_field is invalid');
 
     // Update the sensor to look for nodes with a reference to term1 in the
     // first field and term2 in the second.