diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 9c86de06affa1880a1076fc806164546a22968c0..9294718550cd218e11ed5249b4da3e28bf400882 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -2120,7 +2120,6 @@ static void doMergeTwoLevelData(STsdbReadHandle* pTsdbReadHandle, STableCheckInf
 
         int32_t qstart = 0, qend = 0;
         getQualifiedRowsPos(pTsdbReadHandle, pos, end, numOfRows, &qstart, &qend);
-        lastKeyAppend = tsArray[qend];
 
         if ((lastKeyAppend != TSKEY_INITIAL_VAL) &&
             (lastKeyAppend != (ASCENDING_TRAVERSE(pTsdbReadHandle->order) ? tsArray[qstart] : tsArray[qend]))) {