diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4b8455b..a3c15420 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - [Misc quick form code and documentation improvements #703](https://github.com/farmOS/farmOS/pull/703)
 
+### Fixed
+
+- [Validate quantity entities created by create_quantity #721](https://github.com/farmOS/farmOS/pull/721)
+
 ## [2.1.3] 2023-09-20
 
 ### Changed
diff --git a/modules/core/quantity/src/Plugin/migrate/process/CreateQuantity.php b/modules/core/quantity/src/Plugin/migrate/process/CreateQuantity.php
index 4d904507..5dabe7b2 100644
--- a/modules/core/quantity/src/Plugin/migrate/process/CreateQuantity.php
+++ b/modules/core/quantity/src/Plugin/migrate/process/CreateQuantity.php
@@ -5,6 +5,7 @@ namespace Drupal\quantity\Plugin\migrate\process;
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\migrate\MigrateExecutableInterface;
+use Drupal\migrate\MigrateSkipRowException;
 use Drupal\migrate\ProcessPluginBase;
 use Drupal\migrate\Row;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -74,8 +75,18 @@ class CreateQuantity extends ProcessPluginBase implements ContainerFactoryPlugin
         }
 
         // Create the entity.
+        /** @var \Drupal\quantity\Entity\QuantityInterface $entity */
         $entity = $this->quantityStorage->create($entity_values);
 
+        // Validate the entity.
+        /** @var \Symfony\Component\Validator\ConstraintViolationInterface[] $violations */
+        $violations = $entity->validate();
+        if (!empty($violations)) {
+          foreach ($violations as $violation) {
+            throw new MigrateSkipRowException($violation->getPropertyPath() . '=' . $violation->getMessage());
+          }
+        }
+
         // Save the entity so it has an ID.
         $entity->save();