diff --git a/src/hnswvacuum.c b/src/hnswvacuum.c
index 0651b22..b9f7aa0 100644
--- a/src/hnswvacuum.c
+++ b/src/hnswvacuum.c
@@ -492,6 +492,7 @@ MarkDeleted(HnswVacuumState * vacuumstate)
 		UnlockReleaseBuffer(buf);
 	}
 
+	/* Update insert page last, after everything has been marked as deleted */
 	HnswUpdateMetaPage(index, false, NULL, insertPage, MAIN_FORKNUM);
 }