diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index e5d8269ff9abb215bef45363040584efda8d4bc2..5519dd69c2522b9765de75a6dfd0a27f1f872886 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -4385,7 +4385,8 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   const char* msg16 = "only support one column";
   const char* msg17 = "invalid column name";
   const char* msg18 = "primary timestamp column cannot be dropped";
-  
+  const char* msg19 = "invalid new tag name";
+
   SSqlCmd*        pCmd = &pSql->cmd;
   SAlterTableSQL* pAlterSQL = pInfo->pAlterInfo;
   SQueryInfo*     pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
@@ -4486,12 +4487,12 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
 
     SSQLToken srcToken = {.z = pSrcItem->pVar.pz, .n = pSrcItem->pVar.nLen, .type = TK_STRING};
     if (getColumnIndexByName(pCmd, &srcToken, pQueryInfo, &srcIndex) != TSDB_CODE_SUCCESS) {
-      return TSDB_CODE_TSC_INVALID_SQL;
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg17);
     }
 
     SSQLToken destToken = {.z = pDstItem->pVar.pz, .n = pDstItem->pVar.nLen, .type = TK_STRING};
     if (getColumnIndexByName(pCmd, &destToken, pQueryInfo, &destIndex) == TSDB_CODE_SUCCESS) {
-      return TSDB_CODE_TSC_INVALID_SQL;
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg19);
     }
 
     char name[TSDB_COL_NAME_LEN] = {0};