diff --git a/backend/src/main/java/ai/dragon/repository/AbstractRepository.java b/backend/src/main/java/ai/dragon/repository/AbstractRepository.java
index 566e1ec6..164636b6 100644
--- a/backend/src/main/java/ai/dragon/repository/AbstractRepository.java
+++ b/backend/src/main/java/ai/dragon/repository/AbstractRepository.java
@@ -58,7 +58,7 @@ public boolean exists(String uuid) {
     }
 
     public boolean exists(UUID uuid) {
-        return getByUuid(uuid) != null;
+        return getByUuid(uuid).isPresent();
     }
 
     public Optional<T> getByUuid(String uuid) {