diff --git a/src/CoreShop/Bundle/ResourceBundle/DeepCopy/PimcoreFieldCollectionDefinitionMatcher.php b/src/CoreShop/Bundle/ResourceBundle/DeepCopy/PimcoreFieldCollectionDefinitionMatcher.php
new file mode 100644
index 0000000000..2bb6bc0b26
--- /dev/null
+++ b/src/CoreShop/Bundle/ResourceBundle/DeepCopy/PimcoreFieldCollectionDefinitionMatcher.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * CoreShop
+ *
+ * This source file is available under two different licenses:
+ *  - GNU General Public License version 3 (GPLv3)
+ *  - CoreShop Commercial License (CCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) CoreShop GmbH (https://www.coreshop.org)
+ * @license    https://www.coreshop.org/license     GPLv3 and CCL
+ *
+ */
+
+namespace CoreShop\Bundle\ResourceBundle\DeepCopy;
+
+use DeepCopy\Matcher\Matcher;
+use Pimcore\Model\DataObject\Fieldcollection;
+
+class PimcoreFieldCollectionDefinitionMatcher implements Matcher
+{
+    public function __construct(private string $matchType)
+    {
+    }
+
+    public function matches(mixed $object, mixed $property): bool
+    {
+        if ($object instanceof Fieldcollection\Data\AbstractData) {
+            $collectionDef = Fieldcollection\Definition::getByKey($object->getType());
+
+            if ($collectionDef instanceof Fieldcollection\Definition) {
+                return $collectionDef->getFieldDefinition($property) instanceof $this->matchType;
+            }
+        }
+
+        return false;
+    }
+}
diff --git a/src/CoreShop/Bundle/ResourceBundle/DeepCopy/PimcoreFieldCollectionDefinitionReplaceFilter.php b/src/CoreShop/Bundle/ResourceBundle/DeepCopy/PimcoreFieldCollectionDefinitionReplaceFilter.php
new file mode 100644
index 0000000000..c64a9ad573
--- /dev/null
+++ b/src/CoreShop/Bundle/ResourceBundle/DeepCopy/PimcoreFieldCollectionDefinitionReplaceFilter.php
@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * CoreShop
+ *
+ * This source file is available under two different licenses:
+ *  - GNU General Public License version 3 (GPLv3)
+ *  - CoreShop Commercial License (CCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ * @copyright  Copyright (c) CoreShop GmbH (https://www.coreshop.org)
+ * @license    https://www.coreshop.org/license     GPLv3 and CCL
+ *
+ */
+
+namespace CoreShop\Bundle\ResourceBundle\DeepCopy;
+
+use DeepCopy\Filter\Filter;
+use DeepCopy\Reflection\ReflectionHelper;
+use Pimcore\Model\DataObject\Concrete;
+use Pimcore\Model\DataObject\Fieldcollection;
+
+class PimcoreFieldCollectionDefinitionReplaceFilter implements Filter
+{
+    public function __construct(protected \Closure $callback)
+    {
+    }
+
+    public function apply($object, $property, $objectCopier)
+    {
+        if (!$object instanceof Fieldcollection\Data\AbstractData) {
+            return;
+        }
+
+        $fieldDefinition = $object->getDefinition()->getFieldDefinition($property);
+
+        if (!$fieldDefinition) {
+            return;
+        }
+
+        $reflectionProperty = ReflectionHelper::getProperty($object, $property);
+        $reflectionProperty->setAccessible(true);
+
+        $value = ($this->callback)($object, $fieldDefinition, $property, $reflectionProperty->getValue($object));
+
+        $reflectionProperty->setValue($object, $value);
+    }
+}
diff --git a/src/CoreShop/Bundle/ResourceBundle/EventListener/DeepCopySubscriber.php b/src/CoreShop/Bundle/ResourceBundle/EventListener/DeepCopySubscriber.php
index 241c17ec72..eb46756014 100644
--- a/src/CoreShop/Bundle/ResourceBundle/EventListener/DeepCopySubscriber.php
+++ b/src/CoreShop/Bundle/ResourceBundle/EventListener/DeepCopySubscriber.php
@@ -18,13 +18,20 @@
 
 namespace CoreShop\Bundle\ResourceBundle\EventListener;
 
+use CoreShop\Bundle\ResourceBundle\DeepCopy\PimcoreFieldCollectionDefinitionMatcher;
+use CoreShop\Bundle\ResourceBundle\DeepCopy\PimcoreFieldCollectionDefinitionReplaceFilter;
 use CoreShop\Bundle\ResourceBundle\Pimcore\CacheMarshallerInterface;
+use CoreShop\Component\Resource\Model\ResourceInterface;
 use DeepCopy\DeepCopy;
 use DeepCopy\Filter\Doctrine\DoctrineCollectionFilter;
 use DeepCopy\Matcher\PropertyTypeMatcher;
 use DeepCopy\TypeMatcher\TypeMatcher;
 use Pimcore\Event\SystemEvents;
+use Pimcore\Model\DataObject\ClassDefinition\Data;
 use Pimcore\Model\DataObject\Concrete;
+use Pimcore\Model\DataObject\Fieldcollection\Data\AbstractData;
+use Pimcore\Model\Element\DeepCopy\PimcoreClassDefinitionMatcher;
+use Pimcore\Model\Element\DeepCopy\PimcoreClassDefinitionReplaceFilter;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\EventDispatcher\GenericEvent;
 
@@ -55,6 +62,41 @@ public function addDoctrineCollectionFilter(GenericEvent $event): void
             $event->setArgument('copier', $copier);
         }
 
+        if (($context['source'] ?? false) === 'Pimcore\Model\Version::marshalData') {
+            /**
+             * Pimcore handles CustomVersionMarshallInterface for Objects, but not for Fieldcollections
+             * this means that our custom types, get fully copied and serialized in to the version file
+             * meaning that for Cart Price Rules, you can end up serializing 100MB of data.... 🙈
+             */
+            $copier->addFilter(
+                new PimcoreFieldCollectionDefinitionReplaceFilter(
+                    function (AbstractData $object, Data $fieldDefinition, mixed $property, mixed $currentValue): mixed {
+                        if ($fieldDefinition instanceof Data\CustomVersionMarshalInterface) {
+                            return $fieldDefinition->marshalVersion($object->getObject(), $currentValue);
+                        }
+
+                        return $currentValue;
+                    }
+                ),
+                new PimcoreFieldCollectionDefinitionMatcher(Data\CustomVersionMarshalInterface::class)
+            );
+        }
+
+        if (($context['source'] ?? false) === 'Pimcore\Model\Version::unmarshalData') {
+            $copier->addFilter(
+                new PimcoreFieldCollectionDefinitionReplaceFilter(
+                    function (AbstractData $object, Data $fieldDefinition, mixed $property, mixed $currentValue): mixed {
+                        if ($fieldDefinition instanceof Data\CustomVersionMarshalInterface) {
+                            return $fieldDefinition->unmarshalVersion($object->getObject(), $currentValue);
+                        }
+
+                        return $currentValue;
+                    }
+                ),
+                new PimcoreFieldCollectionDefinitionMatcher(Data\CustomVersionMarshalInterface::class)
+            );
+        }
+
         if (($context['source'] ?? false) === 'Pimcore\Cache\Core\CoreCacheHandler::storeCacheData') {
             /**
              * This honestly absolutely sucks: