diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 8528985e05022e1f76c11050974ceb8a615ff763..6ce161560a36d2879250a35dd23ce3329319dcf5 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -1175,6 +1175,20 @@ static SSDataBlock* doRangeScan(SStreamScanInfo* pInfo, SSDataBlock* pSDB, int32
   }
 }
 
+static int32_t getPreSessionWindow(SStreamAggSupporter* pAggSup, TSKEY startTs, TSKEY endTs, uint64_t groupId,
+                                      SSessionKey* pKey) {
+  pKey->win.skey = startTs;
+  pKey->win.ekey = endTs;
+  pKey->groupId = groupId;
+  
+  SStreamStateCur* pCur = streamStateSessionSeekKeyCurrentPrev(pAggSup->pState, pKey);
+  int32_t          code = streamStateSessionGetKVByCur(pCur, pKey, NULL, 0);
+  if (code != TSDB_CODE_SUCCESS) {
+    SET_SESSION_WIN_KEY_INVALID(pKey);
+  }
+  return code;
+}
+
 static int32_t generateSessionScanRange(SStreamScanInfo* pInfo, SSDataBlock* pSrcBlock, SSDataBlock* pDestBlock) {
   blockDataCleanup(pDestBlock);
   if (pSrcBlock->info.rows == 0) {
@@ -1210,7 +1224,14 @@ static int32_t generateSessionScanRange(SStreamScanInfo* pInfo, SSDataBlock* pSr
     }
     SSessionKey endWin = {0};
     getCurSessionWindow(pInfo->windowSup.pStreamAggSup, endData[i], endData[i], groupId, &endWin);
-    ASSERT(!IS_INVALID_SESSION_WIN_KEY(endWin));
+    if(IS_INVALID_SESSION_WIN_KEY(endWin)) {
+      getPreSessionWindow(pInfo->windowSup.pStreamAggSup, endData[i], endData[i], groupId, &endWin);
+    }
+    if (IS_INVALID_SESSION_WIN_KEY(startWin)) {
+      // window has been closed.
+      qError("generate session scan range failed. rang start:%" PRIx64 ", end:%" PRIx64 , startData[i], endData[i]);
+      continue;
+    }
     colDataAppend(pDestStartCol, i, (const char*)&startWin.win.skey, false);
     colDataAppend(pDestEndCol, i, (const char*)&endWin.win.ekey, false);
 
diff --git a/tests/script/tsim/stream/deleteSession.sim b/tests/script/tsim/stream/deleteSession.sim
index 541609633b023611815252cde0109cdc01094198..c3c64a597774c490a1491816e0e2175be739828d 100644
--- a/tests/script/tsim/stream/deleteSession.sim
+++ b/tests/script/tsim/stream/deleteSession.sim
@@ -524,6 +524,112 @@ if $data42 != 14 then
   goto loop20
 endi
 
+sql drop database if exists test4;
+sql drop stream if exists streams4;
+sql create database test4  vgroups 1;
+sql use test4;
+sql create stable st(ts timestamp,a int,b int,c int) tags(ta int,tb int,tc int);
+sql create table t1 using st tags(1,1,1);
+sql create table t2 using st tags(2,2,2);
+
+print create stream streams4 trigger at_once  into streamt4 as select  _wstart, count(*) c1 from st partition by tbname session(ts, 2s);
+sql create stream streams4 trigger at_once  into streamt4 as select  _wstart, count(*) c1 from st partition by tbname session(ts, 2s);
+
+sql insert into t1 values(1648791210000,1,2,3);
+sql insert into t1 values(1648791220000,2,2,3);
+sql insert into t1 values(1648791221000,2,2,3);
+sql insert into t1 values(1648791222000,2,2,3);
+sql insert into t1 values(1648791223000,2,2,3);
+sql insert into t1 values(1648791231000,2,2,3);
+
+sql insert into t2 values(1648791210000,1,2,3);
+sql insert into t2 values(1648791220000,2,2,3);
+sql insert into t2 values(1648791221000,2,2,3);
+sql insert into t2 values(1648791231000,2,2,3);
+
+$loop_count = 0
+
+loop21:
+sleep 200
+sql select * from streamt4 order by c1 desc;;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 6 then
+  print =====rows=$rows
+  goto loop21
+endi
+
+if $data01 != 4 then
+  print =====data01=$data01
+  goto loop21
+endi
+
+if $data11 != 2 then
+  print =====data11=$data11
+  goto loop21
+endi
+
+if $data21 != 1 then
+  print =====data21=$data21
+  goto loop21
+endi
+
+if $data31 != 1 then
+  print =====data31=$data31
+  goto loop21
+endi
+
+if $data41 != 1 then
+  print =====data41=$data41
+  goto loop21
+endi
+
+if $data51 != 1 then
+  print =====data51=$data51
+  goto loop21
+endi
+
+print delete from st where ts >= 1648791220000 and ts <=1648791223000;
+sql delete from st where ts >= 1648791220000 and ts <=1648791223000;
+
+loop22:
+sleep 200
+sql select * from streamt4 order by c1 desc;;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 4 then
+  print =====rows=$rows
+  goto loop22
+endi
+
+if $data01 != 1 then
+  print =====data01=$data01
+  goto loop22
+endi
+
+if $data11 != 1 then
+  print =====data11=$data11
+  goto loop22
+endi
+
+if $data21 != 1 then
+  print =====data21=$data21
+  goto loop22
+endi
+
+if $data31 != 1 then
+  print =====data31=$data31
+  goto loop22
+endi
+
 $loop_all = $loop_all + 1
 print ============loop_all=$loop_all
 
diff --git a/tests/script/tsim/stream/deleteState.sim b/tests/script/tsim/stream/deleteState.sim
index ecd9f55340edbc79265255848f5240f0c02fd737..45d9bc3e39e926c459fb210345ba5713a6528867 100644
--- a/tests/script/tsim/stream/deleteState.sim
+++ b/tests/script/tsim/stream/deleteState.sim
@@ -189,6 +189,112 @@ if $data12 != 4 then
   goto loop6
 endi
 
+sql drop database if exists test4;
+sql drop stream if exists streams4;
+sql create database test4  vgroups 1;
+sql use test4;
+sql create stable st(ts timestamp,a int,b int,c int) tags(ta int,tb int,tc int);
+sql create table t1 using st tags(1,1,1);
+sql create table t2 using st tags(2,2,2);
+
+print create stream streams4 trigger at_once  into streamt4 as select  _wstart, count(*) c1 from st partition by tbname state_window(c);
+sql create stream streams4 trigger at_once  into streamt4 as select  _wstart, count(*) c1 from st partition by tbname state_window(c);
+
+sql insert into t1 values(1648791210000,1,2,1);
+sql insert into t1 values(1648791220000,2,2,2);
+sql insert into t1 values(1648791221000,2,2,2);
+sql insert into t1 values(1648791222000,2,2,2);
+sql insert into t1 values(1648791223000,2,2,2);
+sql insert into t1 values(1648791231000,2,2,3);
+
+sql insert into t2 values(1648791210000,1,2,1);
+sql insert into t2 values(1648791220000,2,2,2);
+sql insert into t2 values(1648791221000,2,2,2);
+sql insert into t2 values(1648791231000,2,2,3);
+
+$loop_count = 0
+
+loop21:
+sleep 200
+sql select * from streamt4 order by c1 desc;;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 6 then
+  print =====rows=$rows
+  goto loop21
+endi
+
+if $data01 != 4 then
+  print =====data01=$data01
+  goto loop21
+endi
+
+if $data11 != 2 then
+  print =====data11=$data11
+  goto loop21
+endi
+
+if $data21 != 1 then
+  print =====data21=$data21
+  goto loop21
+endi
+
+if $data31 != 1 then
+  print =====data31=$data31
+  goto loop21
+endi
+
+if $data41 != 1 then
+  print =====data41=$data41
+  goto loop21
+endi
+
+if $data51 != 1 then
+  print =====data51=$data51
+  goto loop21
+endi
+
+print delete from st where ts >= 1648791220000 and ts <=1648791223000;
+sql delete from st where ts >= 1648791220000 and ts <=1648791223000;
+
+loop22:
+sleep 200
+sql select * from streamt4 order by c1 desc;;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 4 then
+  print =====rows=$rows
+  goto loop22
+endi
+
+if $data01 != 1 then
+  print =====data01=$data01
+  goto loop22
+endi
+
+if $data11 != 1 then
+  print =====data11=$data11
+  goto loop22
+endi
+
+if $data21 != 1 then
+  print =====data21=$data21
+  goto loop22
+endi
+
+if $data31 != 1 then
+  print =====data31=$data31
+  goto loop22
+endi
+
 
 $loop_all = $loop_all + 1
 print ============loop_all=$loop_all