diff --git a/core b/core
index 7cb935bf..337f2dd2 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 7cb935bfa23c6e8474bd12f19e6f8dee814e8a47
+Subproject commit 337f2dd2835f66c1c4a4255b95fd67569d515d50
diff --git a/deploy/deploy-peer/src/main/resources/config/init/ledger.init b/deploy/deploy-peer/src/main/resources/config/init/ledger.init
index 2e6c2011..c08bb293 100644
--- a/deploy/deploy-peer/src/main/resources/config/init/ledger.init
+++ b/deploy/deploy-peer/src/main/resources/config/init/ledger.init
@@ -14,7 +14,7 @@ root-ca-path=
 created-time=2019-08-01 14:26:58.069+0800
 
 #账本数据底层结构，分为：MERKLE_TREE, KV两种，默认MERKLE_TREE
-ledger.data.structure=MERKLE_TREE
+ledger.data.structure=KV
 
 #-----------------------------------------------
 # 初始的角色名称列表；可选项；