From 75d0f009ece6676b10523a41794670c6277b0d86 Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Thu, 22 Jul 2021 16:46:36 +0100
Subject: [PATCH] Don't set prev state when it is the same as the event it
 replaces (#1936)

---
 syncapi/consumers/roomserver.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/syncapi/consumers/roomserver.go b/syncapi/consumers/roomserver.go
index a6aeee3a8..0d6f528ad 100644
--- a/syncapi/consumers/roomserver.go
+++ b/syncapi/consumers/roomserver.go
@@ -378,7 +378,7 @@ func (s *OutputRoomEventConsumer) updateStateEvent(event *gomatrixserverlib.Head
 		return event, err
 	}
 
-	if prevEvent == nil {
+	if prevEvent == nil || prevEvent.EventID() == event.EventID() {
 		return event, nil
 	}