diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index 388e22a561907b847f5f09b50784873c466bc5d1..e90bcf3d8889d188527b595f6e81dc59ce905eef 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -181,7 +181,8 @@ TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_SUCH_FILE_OR_DIR,      0, 0x0507, "vnode no s
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_OUT_OF_MEMORY,            0, 0x0508, "vnode out of memory")
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_APP_ERROR,                0, 0x0509, "vnode app error")
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_INVALID_STATUS,           0, 0x0510, "vnode not in ready state")
-TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_WRITE_AUTH,            0, 0x0511, "vnode no write auth")
+TAOS_DEFINE_ERROR(TSDB_CODE_VND_NOT_SYNCED,               0, 0x0511, "vnode not in synced state")
+TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_WRITE_AUTH,            0, 0x0512, "vnode no write auth")
 
 // tsdb
 TAOS_DEFINE_ERROR(TSDB_CODE_TDB_INVALID_TABLE_ID,         0, 0x0600, "tsdb invalid table id")
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index bdc3b69d8495cc88bf3eb25a37242b81254337ed..0ee4ef48375cf7b92d1920cef05403545ad04aa7 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -160,13 +160,14 @@ int32_t vnodeDrop(int32_t vgId) {
 
 int32_t vnodeAlter(void *param, SMDCreateVnodeMsg *pVnodeCfg) {
   SVnodeObj *pVnode = param;
-  pVnode->status = TAOS_VN_STATUS_UPDATING;
 
   if (pVnode->status != TAOS_VN_STATUS_READY) 
     return TSDB_CODE_VND_INVALID_STATUS;
 
-  if (pVnode->syncCfg.replica > 1 && pVnode->role == TAOS_SYNC_ROLE_UNSYNCED)
-    return TSDB_CODE_VND_INVALID_STATUS;
+  if (pVnode->syncCfg.replica > 1 && pVnode->role == TAOS_SYNC_ROLE_UNSYNCED) 
+    return TSDB_CODE_VND_NOT_SYNCED;
+
+  pVnode->status = TAOS_VN_STATUS_UPDATING;
 
   int32_t code = vnodeSaveCfg(pVnodeCfg);
   if (code != TSDB_CODE_SUCCESS) return code; 
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index cc522c5d5a95c762bc909a5a23c7aab436346a96..031915809e3eeced5fbc7c0bd5a76cc83d7093d7 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -61,7 +61,7 @@ int32_t vnodeProcessWrite(void *param1, int qtype, void *param2, void *item) {
       return TSDB_CODE_VND_INVALID_STATUS;  // it may be in deleting or closing state
 
     if (pVnode->syncCfg.replica > 1 && pVnode->role != TAOS_SYNC_ROLE_MASTER)
-      return TSDB_CODE_VND_INVALID_STATUS;
+      return TSDB_CODE_RPC_NOT_READY;
 
     // assign version
     pVnode->version++;