diff --git a/rules-tests/Php80/Rector/Property/NestedAnnotationToAttributeRector/Fixture/merge_with_existing_attribute.php.inc b/rules-tests/Php80/Rector/Property/NestedAnnotationToAttributeRector/Fixture/merge_with_existing_attribute.php.inc
new file mode 100644
index 00000000000..0d33ee69d1d
--- /dev/null
+++ b/rules-tests/Php80/Rector/Property/NestedAnnotationToAttributeRector/Fixture/merge_with_existing_attribute.php.inc
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Php80\Rector\Property\NestedAnnotationToAttributeRector\Fixture;
+
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Table(name="api_alert")
+ */
+#[ApiResource]
+class Alert
+{
+}
+
+?>
+-----
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Php80\Rector\Property\NestedAnnotationToAttributeRector\Fixture;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ApiResource]
+#[ORM\Table(name: 'api_alert')]
+class Alert
+{
+}
+
+?>
diff --git a/rules/Php80/Rector/Property/NestedAnnotationToAttributeRector.php b/rules/Php80/Rector/Property/NestedAnnotationToAttributeRector.php
index eb778585c3c..432eeb72ce3 100644
--- a/rules/Php80/Rector/Property/NestedAnnotationToAttributeRector.php
+++ b/rules/Php80/Rector/Property/NestedAnnotationToAttributeRector.php
@@ -121,7 +121,7 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
-        $node->attrGroups = $attributeGroups;
+        $node->attrGroups = array_merge($node->attrGroups, $attributeGroups);
         $this->completeExtraUseImports($attributeGroups);
 
         return $node;