diff --git a/drivers/mongodb/mongodb-reactive-driver/src/main/java/io/mongock/driver/mongodb/reactive/repository/MongoReactiveRepositoryBase.java b/drivers/mongodb/mongodb-reactive-driver/src/main/java/io/mongock/driver/mongodb/reactive/repository/MongoReactiveRepositoryBase.java
index 6020dd61f..7c7520f6d 100644
--- a/drivers/mongodb/mongodb-reactive-driver/src/main/java/io/mongock/driver/mongodb/reactive/repository/MongoReactiveRepositoryBase.java
+++ b/drivers/mongodb/mongodb-reactive-driver/src/main/java/io/mongock/driver/mongodb/reactive/repository/MongoReactiveRepositoryBase.java
@@ -71,7 +71,6 @@ protected void cleanResidualUniqueKeys() {
   }
 
   private List<Document> getResidualKeys() {
-    SubscriberSync<Document> subscriber = new MongoSubscriberSync<>();
     return collection.listIndexes()
         .stream()
         .filter(this::doesNeedToBeRemoved)