diff --git a/dora/core/common/src/main/java/alluxio/collections/IndexedSet.java b/dora/core/common/src/main/java/alluxio/collections/IndexedSet.java
index d584fa35321a..dd5c9d909c2e 100644
--- a/dora/core/common/src/main/java/alluxio/collections/IndexedSet.java
+++ b/dora/core/common/src/main/java/alluxio/collections/IndexedSet.java
@@ -136,7 +136,7 @@ public IndexedSet(IndexDefinition<T, ?> primaryIndexDefinition,
     }
 
     mPrimaryIndex = indices.get(primaryIndexDefinition);
-    mIndices = Collections.unmodifiableMap(indices);
+    mIndices = indices;
   }
 
   /**