diff --git a/include/libs/sync/sync.h b/include/libs/sync/sync.h
index e86a4f96905512dd08af6acc4b9563206b93f985..2a0a4b0f63ae70c95423a0fc59cf7200417ebd10 100644
--- a/include/libs/sync/sync.h
+++ b/include/libs/sync/sync.h
@@ -154,14 +154,14 @@ typedef struct SSnapshotMeta {
 typedef struct SSyncFSM {
   void* data;
 
-  int32_t (*FpCommitCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, const SFsmCbMeta* pMeta);
+  int32_t (*FpCommitCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, SFsmCbMeta* pMeta);
   SyncIndex (*FpAppliedIndexCb)(const struct SSyncFSM* pFsm);
-  int32_t (*FpPreCommitCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, const SFsmCbMeta* pMeta);
-  void (*FpRollBackCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, const SFsmCbMeta* pMeta);
+  int32_t (*FpPreCommitCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, SFsmCbMeta* pMeta);
+  void (*FpRollBackCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, SFsmCbMeta* pMeta);
 
   void (*FpRestoreFinishCb)(const struct SSyncFSM* pFsm, const SyncIndex commitIdx);
-  void (*FpReConfigCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, const SReConfigCbMeta* pMeta);
-  void (*FpLeaderTransferCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, const SFsmCbMeta* pMeta);
+  void (*FpReConfigCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, SReConfigCbMeta* pMeta);
+  void (*FpLeaderTransferCb)(const struct SSyncFSM* pFsm, SRpcMsg* pMsg, SFsmCbMeta* pMeta);
   bool (*FpApplyQueueEmptyCb)(const struct SSyncFSM* pFsm);
   int32_t (*FpApplyQueueItems)(const struct SSyncFSM* pFsm);
 
diff --git a/source/dnode/mnode/impl/src/mndSync.c b/source/dnode/mnode/impl/src/mndSync.c
index 5be60c00a966dacda53d198195d1e436724b821f..3292d8fac26b5ba49d8e34d1a690293c12e6c548 100644
--- a/source/dnode/mnode/impl/src/mndSync.c
+++ b/source/dnode/mnode/impl/src/mndSync.c
@@ -133,6 +133,11 @@ _OUT:
 
 static int32_t mndTransValidateImp(SMnode *pMnode, STrans *pTrans) {
   if (pTrans->stage == TRN_STAGE_PREPARE) {
+    if (mndTransCheckConflict(pMnode, pTrans) < 0) {
+      mError("trans:%d, failed to validate trans conflicts.", pTrans->id);
+      return -1;
+    }
+
     return mndTransValidatePrepareStage(pMnode, pTrans);
   }
   return 0;
@@ -153,10 +158,12 @@ static int32_t mndTransValidate(SMnode *pMnode, SSdbRaw *pRaw) {
 _OUT:
   if (pTrans) mndTransDropData(pTrans);
   if (pRow) taosMemoryFreeClear(pRow);
+  if (code) terrno = (terrno ? terrno : TSDB_CODE_MND_TRANS_CONFLICT);
   return code;
 }
 
-int32_t mndProcessWriteMsg(SMnode *pMnode, SRpcMsg *pMsg, const SFsmCbMeta *pMeta) {
+int32_t mndProcessWriteMsg(SMnode *pMnode, SRpcMsg *pMsg, SFsmCbMeta *pMeta) {
+  terrno = TSDB_CODE_SUCCESS;
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
   SSdbRaw   *pRaw = pMsg->pCont;
   STrans    *pTrans = NULL;
@@ -177,6 +184,8 @@ int32_t mndProcessWriteMsg(SMnode *pMnode, SRpcMsg *pMsg, const SFsmCbMeta *pMet
   code = mndTransValidate(pMnode, pRaw);
   if (code != 0) {
     mError("trans:%d, failed to validate requested trans since %s", transId, terrstr());
+    code = 0;
+    pMeta->code = terrno;
     goto _OUT;
   }
 
@@ -236,7 +245,7 @@ _OUT:
   return 0;
 }
 
-int32_t mndSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsmCbMeta *pMeta) {
+int32_t mndSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, SFsmCbMeta *pMeta) {
   SMnode *pMnode = pFsm->data;
   int32_t code = pMsg->code;
   if (code != 0) {
@@ -245,6 +254,7 @@ int32_t mndSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsmCbMeta *
 
   pMsg->info.conn.applyIndex = pMeta->index;
   pMsg->info.conn.applyTerm = pMeta->term;
+  pMeta->code = 0;
 
   atomic_store_64(&pMnode->applied, pMsg->info.conn.applyIndex);
 
@@ -255,7 +265,7 @@ int32_t mndSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsmCbMeta *
   code = mndProcessWriteMsg(pMnode, pMsg, pMeta);
 
 _OUT:
-  mndPostMgmtCode(pMnode, code);
+  mndPostMgmtCode(pMnode, code ? code : pMeta->code);
   rpcFreeCont(pMsg->pCont);
   pMsg->pCont = NULL;
   return code;
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index 29f1ddc50f5935b1f69ec01dee3c5dbd809882f0..ff551e6534d1c445c4465e8f2ad3328f03899196 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -431,7 +431,7 @@ static int32_t vnodeSyncApplyMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsm
   return tmsgPutToQueue(&pVnode->msgCb, APPLY_QUEUE, pMsg);
 }
 
-static int32_t vnodeSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsmCbMeta *pMeta) {
+static int32_t vnodeSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, SFsmCbMeta *pMeta) {
   if (pMsg->code == 0) {
     return vnodeSyncApplyMsg(pFsm, pMsg, pMeta);
   }
@@ -451,7 +451,7 @@ static int32_t vnodeSyncCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFs
   return 0;
 }
 
-static int32_t vnodeSyncPreCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsmCbMeta *pMeta) {
+static int32_t vnodeSyncPreCommitMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, SFsmCbMeta *pMeta) {
   if (pMeta->isWeak == 1) {
     return vnodeSyncApplyMsg(pFsm, pMsg, pMeta);
   }
@@ -463,7 +463,7 @@ static SyncIndex vnodeSyncAppliedIndex(const SSyncFSM *pFSM) {
   return atomic_load_64(&pVnode->state.applied);
 }
 
-static void vnodeSyncRollBackMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, const SFsmCbMeta *pMeta) {
+static void vnodeSyncRollBackMsg(const SSyncFSM *pFsm, SRpcMsg *pMsg, SFsmCbMeta *pMeta) {
   SVnode *pVnode = pFsm->data;
   vTrace("vgId:%d, rollback-cb is excuted, fsm:%p, index:%" PRId64 ", weak:%d, code:%d, state:%d %s, type:%s",
          pVnode->config.vgId, pFsm, pMeta->index, pMeta->isWeak, pMeta->code, pMeta->state, syncStr(pMeta->state),