diff --git a/lib/Alchemy/Phrasea/Collection/Reference/ArrayCacheCollectionReferenceRepository.php b/lib/Alchemy/Phrasea/Collection/Reference/ArrayCacheCollectionReferenceRepository.php
index 373eeab202..1ec30411c6 100644
--- a/lib/Alchemy/Phrasea/Collection/Reference/ArrayCacheCollectionReferenceRepository.php
+++ b/lib/Alchemy/Phrasea/Collection/Reference/ArrayCacheCollectionReferenceRepository.php
@@ -74,7 +74,7 @@ class ArrayCacheCollectionReferenceRepository implements CollectionReferenceRepo
         $references = $this->findAll();
 
         foreach ($references as $reference) {
-            if ($reference->getCollectionId() == $collectionId) {
+            if ($reference->getDataboxId() == $databoxId && $reference->getCollectionId() == $collectionId) {
                 return $reference;
             }
         }