fix: delete index filter for desc query

source/dnode/vnode/src/tsdb/tsdbRead.c

@@ -1767,6 +1767,9 @@ static bool overlapWithDelSkyline(STableBlockScanInfo* pBlockScanInfo, const SDa
       if (p->ts > pBlock->minKey.ts && index > 0) {
         index -= 1;
       } else {  // find the first point that is smaller than the minKey.ts of dataBlock.
+        if (p->version == 0 && p->ts == pBlock->minKey.ts && index > 0) {
+          --index;
+        }
         break;
       }
     }