diff --git a/source/libs/executor/src/timesliceoperator.c b/source/libs/executor/src/timesliceoperator.c
index 6ea242f733..7f23255257 100644
--- a/source/libs/executor/src/timesliceoperator.c
+++ b/source/libs/executor/src/timesliceoperator.c
@@ -1247,9 +1247,8 @@ void destroyTimeSliceOperatorInfo(void* param) {
     taosMemoryFree(pInfo->pPrevGroupKey->pData);
     taosMemoryFree(pInfo->pPrevGroupKey);
   }
-  if (pInfo->hasPk) {
+  if (pInfo->hasPk && IS_VAR_DATA_TYPE(pInfo->pkCol.type)) {
     taosMemoryFreeClear(pInfo->prevKey.pks[0].pData);
-    taosMemoryFreeClear(pInfo->prevKey.pks[1].pData);
   }
 
   cleanupExprSupp(&pInfo->scalarSup);