From fb9a2f62d7adcfe7c8b062e2b8db6e1581a7e353 Mon Sep 17 00:00:00 2001
From: Olivier 'reivilibre <oliverw@matrix.org>
Date: Tue, 18 Aug 2026 14:53:47 +0100
Subject: [PATCH] Enable CACHE (txn ID-based idempotence) for
 `/add_user_account_data`

---
 synapse/replication/http/account_data.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/replication/http/account_data.py b/synapse/replication/http/account_data.py
index 560973b916..b16f151524 100644
--- a/synapse/replication/http/account_data.py
+++ b/synapse/replication/http/account_data.py
@@ -49,7 +49,7 @@ class ReplicationAddUserAccountDataRestServlet(ReplicationEndpoint):
 
     NAME = "add_user_account_data"
     PATH_ARGS = ("user_id", "account_data_type")
-    CACHE = False
+    CACHE = True
 
     def __init__(self, hs: "HomeServer"):
         super().__init__(hs)