diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index b6ac6d3173..68ba3cd0bd 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -1907,7 +1907,12 @@ static void multiVnodeInsertFinalize(void* param, TAOS_RES* tres, int numOfRows)
     pParentObj->res.code = pSql->res.code;
   }
 
+  assert(pParentObj->pSubs[pSupporter->index] == tres);
+
+  pParentObj->pSubs[pSupporter->index] = 0;
+  taos_free_result(tres);
   taosTFree(pSupporter);
+
   if (atomic_sub_fetch_32(&pState->numOfRemain, 1) > 0) {
     return;
   }