diff --git a/src/Repository.php b/src/Repository.php
index db43e82..14d3f61 100644
--- a/src/Repository.php
+++ b/src/Repository.php
@@ -11,6 +11,8 @@
 use Makaira\OxidConnectEssential\Type\Product\Product;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
+use function array_unique;
+use function array_values;
 use function get_object_vars;
 
 /**
@@ -211,6 +213,11 @@ public function getChangesFromList(array $result, int $since, int $limit = 50):
                             (array) $this->parentAttributes[$parentId]['attributeFloat'],
                             $change->data->attributeFloat
                         );
+
+                        $change->data->attributeStr   = array_values(array_unique($change->data->attributeStr));
+                        $change->data->attributeInt   = array_values(array_unique($change->data->attributeInt));
+                        $change->data->attributeFloat = array_values(array_unique($change->data->attributeFloat));
+
                         unset(
                             $change->data->tmpAttributeStr,
                             $change->data->tmpAttributeInt,