I can forward to a superseded room, despite being unable to post directly in the room's GUI.

[RokeJulianLockhart]

Steps to reproduce

Exactly how I accomplished it is undermentioned:

1. Post a message to #plasmamobile:kde.org.
2. Forward it to !KuvFdgCUXMBkgiDjsE:postmarketos.org, instead of its replacement: #mainline:postmarketos.org.

It's evidently not generalised, but I presume that it's generalisable.

Outcome

What did you expect?

I expected to be unable to forward due to being unable to post otherwise, or be able to do both.

What happened instead?

1. Summary

   I am solely able to post to the room via forwards.

2. Example

   https://matrix.to/#/!KuvFdgCUXMBkgiDjsE:postmarketos.org/$jMSpj2chm_KR4aJhchtFtyU1tsylSlMOVSsEegDOqzc?via=postmarketos.org&via=matrix.org&via=kde.org is an example:

   {
     "content": {
   	 "format": "org.matrix.custom.html",
   	 "m.mentions": {
   		"user_ids": [
   		  "@tedchang2010:mozilla.org",
   		  "@PureTryOut:matrix.org"
   		]
   	 },
   	 "msgtype": "m.text"
     },
     "origin_server_ts": 1739292640424,
     "sender": "@rokejulianlockhart:matrix.org",
     "type": "m.room.message",
     "unsigned": {
   	 "membership": "join",
   	 "age": 1334,
   	 "transaction_id": "m1739292640184.1"
     },
     "event_id": "$jMSpj2chm_KR4aJhchtFtyU1tsylSlMOVSsEegDOqzc",
     "room_id": "!KuvFdgCUXMBkgiDjsE:postmarketos.org"
   }

   It was forwarded from accidentally forwarded there instead of from its original location of https://matrix.to/#/!vtNRYfppCyOwpgeZRB:postmarketos.org/$Zb8i-tVSWNGz_cG1M0TPxpFGcbteYM2ftDtJxJndqI4?via=postmarketos.org&via=matrix.org&via=kde.org.

Operating system

1. #!/usr/bin/env pwsh
   ConvertFrom-StringData (Get-Content -LiteralPath '/etc/os-release' | Select-String -SimpleMatch 'CPE_NAME')

2. CPE_NAME="cpe:/o:fedoraproject:fedora:41"

Browser information

firefox-135.0-1.fc41.x86_64:

1. #!/usr/bin/env sh
   dnf --refresh info 'firefox'

2. Installed packages
   Name            : firefox
   Epoch           : 0
   Version         : 135.0
   Release         : 1.fc41
   Architecture    : x86_64
   Installed size  : 234.1 MiB
   Source          : firefox-135.0-1.fc41.src.rpm
   From repository : @stored_transaction
   URL             : https://www.mozilla.org/firefox/
   Vendor          : Fedora Project

URL for webapp

https://develop.element.io

Application version

Element version: f7b010a0b319-js-b584f818f51c
Crypto version: Rust SDK 0.9.0 (5de53c7), Vodozemac 0.8.1

Homeserver:

matrix.org

Will you send logs?

Yes