diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index d16a599811..086de593d0 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -577,6 +577,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_FUNC_FUNTION_PARA_TYPE        TAOS_DEF_ERROR_CODE(0, 0x2802)
 #define TSDB_CODE_FUNC_FUNTION_PARA_VALUE       TAOS_DEF_ERROR_CODE(0, 0x2803)
 #define TSDB_CODE_FUNC_NOT_BUILTIN_FUNTION      TAOS_DEF_ERROR_CODE(0, 0x2804)
+#define TSDB_CODE_FUNC_DUP_TIMESTAMP            TAOS_DEF_ERROR_CODE(0, 0x2805)
 
 //udf
 #define TSDB_CODE_UDF_STOPPING                  TAOS_DEF_ERROR_CODE(0, 0x2901)
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index c9e345f49f..c48fa7f059 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -5398,8 +5398,8 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
 
   int32_t i = pInput->startRowIndex;
   if (pCtx->start.key != INT64_MIN) {
-    ASSERT((pCtx->start.key < tsList[i] && pCtx->order == TSDB_ORDER_ASC) ||
-           (pCtx->start.key > tsList[i] && pCtx->order == TSDB_ORDER_DESC));
+    //ASSERT((pCtx->start.key < tsList[i] && pCtx->order == TSDB_ORDER_ASC) ||
+    //       (pCtx->start.key > tsList[i] && pCtx->order == TSDB_ORDER_DESC));
 
     ASSERT(last->key == INT64_MIN);
     for (; i < pInput->numOfRows + pInput->startRowIndex; ++i) {
@@ -5447,6 +5447,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5462,6 +5466,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5476,6 +5484,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5490,6 +5502,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5504,6 +5520,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5518,6 +5538,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5532,6 +5556,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5546,6 +5574,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5560,6 +5592,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
@@ -5574,6 +5610,10 @@ int32_t twaFunction(SqlFunctionCtx* pCtx) {
         numOfElems++;
 
         INIT_INTP_POINT(st, tsList[i], val[i]);
+        if (pInfo->p.key == st.key) {
+          return TSDB_CODE_FUNC_DUP_TIMESTAMP;
+        }
+
         pInfo->dOutput += twa_get_area(pInfo->p, st);
         pInfo->p = st;
       }
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 044cdc86b4..ab0771d218 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -579,6 +579,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_FUNC_FUNTION_PARA_NUM,         "Invalid function par
 TAOS_DEFINE_ERROR(TSDB_CODE_FUNC_FUNTION_PARA_TYPE,        "Invalid function para type")
 TAOS_DEFINE_ERROR(TSDB_CODE_FUNC_FUNTION_PARA_VALUE,       "Invalid function para value")
 TAOS_DEFINE_ERROR(TSDB_CODE_FUNC_NOT_BUILTIN_FUNTION,      "Not buildin function")
+TAOS_DEFINE_ERROR(TSDB_CODE_FUNC_DUP_TIMESTAMP,            "Duplicate timestamps not allowed in function")
 
 //udf
 TAOS_DEFINE_ERROR(TSDB_CODE_UDF_STOPPING,                   "udf is stopping")
diff --git a/tests/system-test/2-query/max_partition.py b/tests/system-test/2-query/max_partition.py
index 01c2677242..08bb7675ad 100644
--- a/tests/system-test/2-query/max_partition.py
+++ b/tests/system-test/2-query/max_partition.py
@@ -181,7 +181,7 @@ class TDTestCase:
         # bug need fix
         tdSql.checkData(0,1,None)
 
-        tdSql.query(f"select c1 , twa(c1) from {dbname}.stb partition by c1 order by c1")
+        tdSql.query(f"select c1 , twa(c1) from {dbname}.sub_stb_1 partition by c1 order by c1")
         tdSql.checkRows(11)
         tdSql.checkData(0,1,None)
 
diff --git a/tests/system-test/2-query/twa.py b/tests/system-test/2-query/twa.py
index 62940477cf..4c163da485 100644
--- a/tests/system-test/2-query/twa.py
+++ b/tests/system-test/2-query/twa.py
@@ -124,7 +124,7 @@ class TDTestCase:
         tdSql.checkData(0,1,4.500000000)
 
         # mixup with other functions
-        tdSql.query(f"select twa(c1),twa(c2),max(c1),elapsed(ts) from {dbname}.stb1 ")
+        tdSql.query(f"select twa(c1),twa(c2),max(c1),elapsed(ts) from {dbname}.ct1 ")
         tdSql.checkData(0,0,1.000000000)
         tdSql.checkData(0,1,11111.000000000)
         tdSql.checkData(0,2,1)