diff --git a/server/src/main/java/org/opensearch/common/util/FeatureFlags.java b/server/src/main/java/org/opensearch/common/util/FeatureFlags.java
index e663d8429da13..6df68013a8119 100644
--- a/server/src/main/java/org/opensearch/common/util/FeatureFlags.java
+++ b/server/src/main/java/org/opensearch/common/util/FeatureFlags.java
@@ -100,7 +100,7 @@ public class FeatureFlags {
      * aggregations.
      */
     public static final String STAR_TREE_INDEX = "opensearch.experimental.feature.composite_index.star_tree.enabled";
-    public static final Setting<Boolean> STAR_TREE_INDEX_SETTING = Setting.boolSetting(STAR_TREE_INDEX, true, Property.NodeScope);
+    public static final Setting<Boolean> STAR_TREE_INDEX_SETTING = Setting.boolSetting(STAR_TREE_INDEX, false, Property.NodeScope);
 
     /**
      * Gates the functionality of application based configuration templates.