diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index bee5a1d990..4597a44845 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -1072,7 +1072,7 @@ static int32_t tsdbCacheUpdate(STsdb *pTsdb, tb_uid_t suid, tb_uid_t uid, SArray
     rocksdb_writebatch_t *wb = pTsdb->rCache.writebatch;
     for (int i = 0; i < num_keys; ++i) {
       SIdxKey        *idxKey = &((SIdxKey *)TARRAY_DATA(remainCols))[i];
-      SLastUpdateCtx *updCtx = (SLastUpdateCtx *)taosArrayGet(updCtxArray, i);
+      SLastUpdateCtx *updCtx = (SLastUpdateCtx *)taosArrayGet(updCtxArray, idxKey->idx);
       SRowKey        *pRowKey = &updCtx->tsdbRowKey.key;
       SColVal        *pColVal = &updCtx->colVal;