diff --git a/concat.md b/concat.md
index ec072dd..7b37add 100644
--- a/concat.md
+++ b/concat.md
@@ -1,7 +1,7 @@
 ---
 title: "`views::concat`"
-document: P2542R5
-date: 2023-09-12
+document: P2542D6
+date: 2023-09-18
 audience: SG9, LEWG, LWG
 author:
   - name: Hui Xie
@@ -13,6 +13,10 @@ toc: true
 
 # Revision History
 
+## R6
+
+- Added a section `!common_range && random_access_range && sized_range`
+
 ## R5
 
 - Removed `concat_expert` (reverting to R3) per SG9 poll.