diff --git a/Neos.Media/Classes/Domain/Repository/AssetRepository.php b/Neos.Media/Classes/Domain/Repository/AssetRepository.php
index 7489ef11d60..4ec41c0037b 100644
--- a/Neos.Media/Classes/Domain/Repository/AssetRepository.php
+++ b/Neos.Media/Classes/Domain/Repository/AssetRepository.php
@@ -283,6 +283,10 @@ protected function addAssetVariantToQueryConstraints(QueryInterface $query): voi
         $variantsConstraints = [];
         $variantClassNames = $this->reflectionService->getAllImplementationClassNamesForInterface(AssetVariantInterface::class);
         foreach ($variantClassNames as $variantClassName) {
+            if (!$this->reflectionService->isClassAnnotatedWith($variantClassName, Flow\Entity::class)) {
+                // ignore non-entity classes to prevent "class schema found" error
+                continue;
+            }
             $variantsConstraints[] = 'e NOT INSTANCE OF ' . $variantClassName;
         }