From 4d47b38dbc0c2e09d235972f59a4338a7bb37cc0 Mon Sep 17 00:00:00 2001
From: Jon Staab <shtaab@gmail.com>
Date: Sat, 23 Nov 2024 07:09:25 -0800
Subject: [PATCH] Switch to rejecting duplicate joins

---
 29.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/29.md b/29.md
index 93dc3d29..7705c6db 100644
--- a/29.md
+++ b/29.md
@@ -72,7 +72,7 @@ These are events that can be sent by users to manage their situation in a group,
 
 - *join request* (`kind:9021`)
 
-Any user can send a kind `9021` event to the relay in order to request admission to the group. Relays MUST reject the request if the user has not been added to the group. The accompanying error message SHOULD explain whether the rejection is final, if the request is pending review, or if some other special handling is relevant (e.g. if payment is required). If a user is already a member, the event MUST be accepted.
+Any user can send a kind `9021` event to the relay in order to request admission to the group. Relays MUST reject the request if the user has not been added to the group. The accompanying error message SHOULD explain whether the rejection is final, if the request is pending review, or if some other special handling is relevant (e.g. if payment is required). If a user is already a member, the event MUST be rejected with `duplicate: ` as the error message prefix.
 
 ```json
 {