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Auth event could not found #12417

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cremesk opened this issue Apr 8, 2022 · 8 comments
Closed

Auth event could not found #12417

cremesk opened this issue Apr 8, 2022 · 8 comments
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T-Other Questions, user support, anything else.

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@cremesk
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cremesk commented Apr 8, 2022

Any idea howto fix this issue?

I see the same if i try to join #mobian:matrix.org

image

also this:

2022-04-08 08:47:27,500 - synapse.handlers.federation_event - 1712 - WARNING - POST-63346-$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI - Missing auth events for <FrozenEventV3 event_id=$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI, type=m.room.member, state_key=@dev2:envs.net, outlier=False>: ['$JLrdupjeE1oeZZvHVy3Kke7Jtxqtq5sq-EHtMXAxu9c']
2022-04-08 08:47:27,500 - synapse.http.server - 690 - WARNING - POST-63346 - Not sending response to request <SynapseRequest at 0x7f92ab322a00 method='POST' uri='/_synapse/replication/remote_join/%21ThIzZNArdoSkaWndMq%3Amatrix.org/%40dev2%3Aenvs.net/WyRtepexpr' clientproto='HTTP/1.1' site='9093'>, already disconnected.
2022-04-08 08:48:01,568 - synapse.handlers.federation_event - 1334 - WARNING - POST-63438-$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI - Dropping event <FrozenEventV3 event_id=$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI, type=m.room.member, state_key=@dev2:envs.net, outlier=False>, which relies on auth_event $JLrdupjeE1oeZZvHVy3Kke7Jtxqtq5sq-EHtMXAxu9c, which could not be found
2022-04-08 08:48:01,862 - synapse.handlers.federation_event - 1334 - WARNING - POST-63438-$BUTwc1eAVdlxWY8dwDVOZ1gpqu-ztC1j4nIWjDjxqLM-$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI - Dropping event <FrozenEventV3 event_id=$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI, type=m.room.member, state_key=@dev2:envs.net, outlier=False>, which relies on auth_event $JLrdupjeE1oeZZvHVy3Kke7Jtxqtq5sq-EHtMXAxu9c, which could not be found
2022-04-08 08:48:01,863 - synapse.handlers.federation_event - 1712 - WARNING - POST-63438-$BUTwc1eAVdlxWY8dwDVOZ1gpqu-ztC1j4nIWjDjxqLM - Missing auth events for <FrozenEventV3 event_id=$BUTwc1eAVdlxWY8dwDVOZ1gpqu-ztC1j4nIWjDjxqLM, type=m.room.member, state_key=@dev2:envs.net, outlier=False>: ['$JLrdupjeE1oeZZvHVy3Kke7Jtxqtq5sq-EHtMXAxu9c', '$t2Y_ognhWMX9ENqzHZyvRfqA1l1eDGyHH4LiuY_D8MI']

i create also an local alias on an other server ( #mobian:tchncs.de ) and try to join via this alias. same problem :/

other try was to purge the room on the instance and rejoin the room but i see the same error. Auth event could not found.

when I look into the room from another HS it looks like the people are joined although it does not work.
image

Version information

  • Homeserver: envs.net

  • Version: 1.56.0

  • Install method: package manager apt

  • Platform: Debian 11

@squahtx
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squahtx commented Apr 8, 2022

#mobian:matrix.org just seems to be broken.

When joining the room via matrix.org, the logs look like:

2022-04-08 13:35:38,872 - synapse.http.matrixfederationclient - 291 - INFO - POST-1 - {PUT-O-3} [matrix.org] Completed request: 200 OK in 35.78 secs, got 23059855 bytes - PUT matrix://matrix.org/_matrix/federation/v2/send_join/%21ThIzZNA
rdoSkaWndMq%3Amatrix.org/%24mY68EPiZm8_tOdaApkdkfLFsFRT3dq9yxwq1DFqQMTg
2022-04-08 13:35:38,872 - synapse.federation.federation_client - 904 - INFO - POST-1 - Processing from send_join 27795 events
2022-04-08 13:35:39,760 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $ETE-f9_CSABmrkO18iUN4EHJWXlg8HBlRabrHts4xf0 seems to have been redacted; using our redacted copy
2022-04-08 13:35:39,956 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $HI6-aKBMuRs61FOTPBjbkflSiBIVQ63w2d01C4ft69w seems to have been redacted; using our redacted copy
2022-04-08 13:35:40,205 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $q3e8LY5X1yjpP5nkAw1oAK6q9aHrNLkvD6GAERFx7LU seems to have been redacted; using our redacted copy
2022-04-08 13:35:40,683 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $3UXRmkGGH_Yfrv8A_wSpiMTvGUq03_4ciUhk-lX3zCI seems to have been redacted; using our redacted copy
2022-04-08 13:35:41,848 - synapse.crypto.keyring - 664 - INFO - PerspectivesKeyFetcher-0 - Requesting keys [_FetchKeyRequest(server_name='cripslock.undef.tools', minimum_valid_until_ts=1616294439748, key_ids=['ed25519:NWbDrM']), _FetchKeyRequest(server_name='xethos.net', minimum_valid_until_ts=1649371306220, key_ids=['ed25519:IHuvSCAb'])] from notary server matrix.org
2022-04-08 13:35:42,251 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $V9Ss1QKshe4htzg234oPS4xOkXEYg4bkMazlHA1JK1c seems to have been redacted; using our redacted copy
2022-04-08 13:35:42,266 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $QKATY_wbojnEC8JZ7aRoQzsvZh-08agvEHqV_qr8Gk8 seems to have been redacted; using our redacted copy
2022-04-08 13:35:42,622 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $UMiLfXVd9RdTmDx6-tAHTZW5bKZ7XP62HefQPvaTeCI seems to have been redacted; using our redacted copy
2022-04-08 13:35:43,073 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $eCd7d0nxo7NvoB_guu6upQWTTvCTDAz2MOFlPcpDGu0 seems to have been redacted; using our redacted copy
2022-04-08 13:35:43,322 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $9vo77ot6f5HTOyoP2TmDvJm3UcBN8CVeW7njYkvO4yY seems to have been redacted; using our redacted copy
2022-04-08 13:35:43,902 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $kPItbWY1tovL6S7hpYggPe-6Vyrk0ZLaEXuO8yoYEe0 seems to have been redacted; using our redacted copy
2022-04-08 13:35:44,530 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $7wRY459pBwUvvU5vxl1gppw2cu2OeU1KinVFrmcqMUg seems to have been redacted; using our redacted copy
2022-04-08 13:35:44,579 - synapse.http.federation.well_known_resolver - 284 - INFO - federation_transaction_transmission_loop-0-- - Error fetching https://cuum.space/.well-known/matrix/server: User timeout caused connection failure.
2022-04-08 13:35:44,620 - synapse.http.matrixfederationclient - 291 - INFO - PerspectivesKeyFetcher-0 - {POST-O-6} [matrix.org] Completed request: 200 OK in 2.77 secs, got 986 bytes - POST matrix://matrix.org/_matrix/key/v2/query
2022-04-08 13:35:44,640 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $IHwQe0-rNgbMGdczpRmeefGpI5BzWFBwVxK_hEnyP3g seems to have been redacted; using our redacted copy
2022-04-08 13:35:45,525 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $dlzZJG2G9tTEXasC-vEfxZK8Ko1MZkEeGClFzli_k5Y seems to have been redacted; using our redacted copy
2022-04-08 13:35:45,606 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $ZTJXVo05G6lLqQ6rG08yCmjbTw2mA7PsXiqRvB4cCR8 seems to have been redacted; using our redacted copy
2022-04-08 13:35:45,750 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $CqKpdMU0UHqw1RExnE8st__Zi3X5RtqjNfVo8UnBxmE seems to have been redacted; using our redacted copy
2022-04-08 13:35:46,241 - synapse.federation.federation_base - 90 - INFO - POST-1 - Event $Fby6kLpKTOzNhJmXvhMCeB2EjJoBxdVzP0un5-NxQhc seems to have been redacted; using our redacted copy
2022-04-08 13:35:46,364 - synapse.http.federation.well_known_resolver - 253 - INFO - ServerKeyFetcher-0- - Fetching https://cripslock.undef.tools/.well-known/matrix/server
2022-04-08 13:35:47,703 - synapse.http.federation.well_known_resolver - 190 - INFO - ServerKeyFetcher-0- - Response from .well-known: {'m.server': 'cripslock.undef.tools:443'}
2022-04-08 13:35:49,166 - synapse.http.matrixfederationclient - 291 - INFO - ServerKeyFetcher-0 - {GET-O-7} [cripslock.undef.tools] Completed request: 200 OK in 2.81 secs, got 325 bytes - GET matrix://cripslock.undef.tools/_matrix/key/v2/server/ed25519%3ANWbDrM
2022-04-08 13:35:49,183 - synapse.federation.federation_base - 70 - WARNING - POST-1 - Signature check failed for $8eIlCJWGkt8weaiNtIGhqqbLF3vvUc5SiMoL6Fu3iGM: 403: event id $8eIlCJWGkt8weaiNtIGhqqbLF3vvUc5SiMoL6Fu3iGM: unable to verify signature for sender cripslock.undef.tools: 401: Failed to find any key to satisfy: _FetchKeyRequest(server_name='cripslock.undef.tools', minimum_valid_until_ts=1616294439748, key_ids=['ed25519:NWbDrM'])
2022-04-08 13:35:49,189 - synapse.federation.federation_base - 70 - WARNING - POST-1 - Signature check failed for $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM: 403: event id $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM: unable to verify signature for sender cripslock.undef.tools: 401: Failed to find any key to satisfy: _FetchKeyRequest(server_name='cripslock.undef.tools', minimum_valid_until_ts=1616231269675, key_ids=['ed25519:NWbDrM'])
2022-04-08 13:35:49,510 - synapse.http.matrixfederationclient - 604 - INFO - POST-1- - {GET-O-8} [cripslock.undef.tools] Got response headers: 403 Forbidden
2022-04-08 13:35:49,511 - synapse.http.matrixfederationclient - 682 - WARNING - POST-1- - {GET-O-8} [cripslock.undef.tools] Request failed: GET matrix://cripslock.undef.tools/_matrix/federation/v1/event/%248eIlCJWGkt8weaiNtIGhqqbLF3vvUc5SiMoL6Fu3iGM: HttpResponseException('403: Forbidden')
2022-04-08 13:35:49,511 - synapse.federation.federation_client - 389 - INFO - POST-1 - Failed to get PDU $8eIlCJWGkt8weaiNtIGhqqbLF3vvUc5SiMoL6Fu3iGM from cripslock.undef.tools because 403: Forbidden
2022-04-08 13:35:49,512 - synapse.federation.federation_client - 581 - WARNING - POST-1 - Failed to find copy of $8eIlCJWGkt8weaiNtIGhqqbLF3vvUc5SiMoL6Fu3iGM with valid signature
2022-04-08 13:35:50,701 - synapse.http.matrixfederationclient - 604 - INFO - POST-1- - {GET-O-9} [cripslock.undef.tools] Got response headers: 403 Forbidden
2022-04-08 13:35:50,702 - synapse.http.matrixfederationclient - 682 - WARNING - POST-1- - {GET-O-9} [cripslock.undef.tools] Request failed: GET matrix://cripslock.undef.tools/_matrix/federation/v1/event/%24xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM: HttpResponseException('403: Forbidden')
2022-04-08 13:35:50,702 - synapse.federation.federation_client - 389 - INFO - POST-1 - Failed to get PDU $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM from cripslock.undef.tools because 403: Forbidden
2022-04-08 13:35:50,702 - synapse.federation.federation_client - 581 - WARNING - POST-1 - Failed to find copy of $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM with valid signature
2022-04-08 13:35:52,779 - synapse.handlers.federation_event - 1324 - INFO - POST-1 - Persisting 2 of 759 remaining outliers: ['$gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE', '$0Gtqg9usaoKaEJa-MB4k--no3I-UNU0zTC0V8hCdyAU']
2022-04-08 13:35:52,817 - synapse.handlers.federation_event - 1375 - WARNING - POST-1-$gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE - Dropping event <FrozenEventV3 event_id=$gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE, type=m.room.member, state_key=@spaetz:sspaeth.de, outlier=False>, which relies on auth_event $nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8, which could not be found
2022-04-08 13:35:52,818 - synapse.handlers.federation_event - 1375 - WARNING - POST-1-$0Gtqg9usaoKaEJa-MB4k--no3I-UNU0zTC0V8hCdyAU - Dropping event <FrozenEventV3 event_id=$0Gtqg9usaoKaEJa-MB4k--no3I-UNU0zTC0V8hCdyAU, type=m.room.member, state_key=@undef:cripslock.undef.tools, outlier=False>, which relies on auth_event $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM, which could not be found
2022-04-08 13:35:52,820 - synapse.handlers.federation_event - 1324 - INFO - POST-1 - Persisting 2 of 757 remaining outliers: ['$9TmR-kWDv8bMqkTWwwJA0g4LYvx1B-6aw2dUo6D1d_8', '$2wJVM0MYLSO2a8-gFcXlc_LEHaDZ-dni0CYHh_bXTH0']
2022-04-08 13:35:52,822 - synapse.handlers.federation_event - 1375 - WARNING - POST-1-$9TmR-kWDv8bMqkTWwwJA0g4LYvx1B-6aw2dUo6D1d_8 - Dropping event <FrozenEventV3 event_id=$9TmR-kWDv8bMqkTWwwJA0g4LYvx1B-6aw2dUo6D1d_8, type=m.room.member, state_key=@spaetz:sspaeth.de, outlier=False>, which relies on auth_event $gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE, which could not be found
2022-04-08 13:35:52,823 - synapse.handlers.federation_event - 1375 - WARNING - POST-1-$2wJVM0MYLSO2a8-gFcXlc_LEHaDZ-dni0CYHh_bXTH0 - Dropping event <FrozenEventV3 event_id=$2wJVM0MYLSO2a8-gFcXlc_LEHaDZ-dni0CYHh_bXTH0, type=m.room.member, state_key=@undef:cripslock.undef.tools, outlier=False>, which relies on auth_event $0Gtqg9usaoKaEJa-MB4k--no3I-UNU0zTC0V8hCdyAU, which could not be found

...and the same for the rest of the auth chain

The first two auth events that can't be found are $nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8 and $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM.

matrix.org somehow doesn't have a record for $nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8.

$xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM is sent by matrix.org but gets discarded.
The event is signed by cripslock.undef.tools with key ed25519:NWbDrM and has an origin_server_ts of 1616231269675 / 2021-03-20 09:07:49 UTC.
To verify the signature on the event, Synapse first tries getting keys from cripslock.undef.tools, but that doesn't provide the desired key:

$ curl https://cripslock.undef.tools/_matrix/key/v2/server/ | jq
{
  "old_verify_keys": {},
  "server_name": "cripslock.undef.tools",
  "signatures": {
    "cripslock.undef.tools": {
      "ed25519:uo6Co8": "r2tpyy82yY/+C1vZRZ+EMBDF5Cck8W8EWaWOVisuySmUGcoAJwzOAorAaIcEkEZYzmPZp0txYq+ai+qn3JX0Ag"
    }
  },
  "valid_until_ts": 1650027188785,
  "verify_keys": {
    "ed25519:uo6Co8": {
      "key": "mS1sGW16WOgvaC232oYCuMlEZKIfqVE5j8zaJoNT2i4"
    }
  }
}

so Synapse retrieves it from matrix.org:

curl https://matrix.org/_matrix/key/v2/query -X POST -H "Content-Type: application/json" --data "{\"server_keys\":{\"cripslock.undef.tools\":{\"ed25519:NWbDrM\":{}}}}" | jq
{
  "server_keys": [
    {
      "old_verify_keys": {
        "ed25519:NWbDrM": {
          "expired_ts": 1601024554498,
          "key": "w6mmVkBwLZR3S7UTz/FlFb34Hfn7qz6fvt1BA/AdCt0"
        }
      },
      "server_name": "cripslock.undef.tools",
      "signatures": {
        "cripslock.undef.tools": {
          "ed25519:uo6Co8": "DLwLNDbXM5cvh6HoWA1Z4MjNhzVYXDhb/39ZzHyutqLUOdM4b+KdI7sbU9rfu98nYI88d8+5hZZF3XK35+m6Aw"
        },
        "matrix.org": {
          "ed25519:auto": "BrgGeCgXYayalaEZob6dLst3YiYq+qWXGdQDyEyWoWLmx8EQR28Ucj1DOp6Is1NIDdUx11yK7Bs8USt7RXNkCg"
        }
      },
      "valid_until_ts": 1644407329080,
      "verify_keys": {
        "ed25519:uo6Co8": {
          "key": "mS1sGW16WOgvaC232oYCuMlEZKIfqVE5j8zaJoNT2i4"
        }
      }
    }
  ]
}

But the key has an expired_ts of 1601024554498 / 2020-09-25 09:02:34 UTC, which is 6 months before the timestamp on the event (1616231269675 / 2021-03-20 09:07:49 UTC).
And so the signature on $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM is considered invalid and the rest of the auth chain is also considered invalid.

Joining the room via cripslock.undef.tools (https://app.element.io/#/room/!ThIzZNArdoSkaWndMq:matrix.org?via=cripslock.undef.tools) doesn't work either:
$nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8, $xughWuXcm_GYF3d04B5MDaoR5kP3oQJMWfWPC3A0cIM and $8eIlCJWGkt8weaiNtIGhqqbLF3vvUc5SiMoL6Fu3iGM aren't included in the send_join response.

I've no idea how the room ended up in this state and I don't think there's a way to join the room without applying temporary hacks to Synapse code.

@squahtx squahtx added the T-Other Questions, user support, anything else. label Apr 8, 2022
@cremesk
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cremesk commented Apr 8, 2022

@squahtx thanks for the try!

i just wrote with the admin of cripslock.undef.tools.
he now also provided the old_signing_key.

$ curl -s https://cripslock.undef.tools/_matrix/key/v2/server/ | jq
{
  "old_verify_keys": {
    "ed25519:NWbDrM": {
      "expired_ts": 1617231279675,
      "key": "w6mmVkBwLZR3S7UTz/FlFb34Hfn7qz6fvt1BA/AdCt0"
    }
  },
  "server_name": "cripslock.undef.tools",
  "signatures": {
    "cripslock.undef.tools": {
      "ed25519:uo6Co8": "R0FQQUR3MMebQqSflsQvj69tiM+H+PznT6uJuX/C6a3RfTWEg+zc7RtE6lhSUAX2OcVM9CxTEbl0zcu7m82wDA"
    }
  },
  "valid_until_ts": 1650033094034,
  "verify_keys": {
    "ed25519:uo6Co8": {
      "key": "mS1sGW16WOgvaC232oYCuMlEZKIfqVE5j8zaJoNT2i4"
    }
  }
}

but that alone does not seem to lead to a solution.

is there maybe something else we can try or should we just replace the room with a new one?

@squahtx
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squahtx commented Apr 8, 2022

he now also provided the old_signing_key.

That's done the trick for one of the missing auth events!

The remaining error is:

2022-04-08 16:11:11,985 - synapse.handlers.federation_event - 1375 - WARNING - POST-40-$gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE - Dropping event <FrozenEventV3 event_id=$gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE, type=m.room.member, state_key=@..., outlier=False>, which relies on auth_event $nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8, which could not be found

$gnk-ddMkO_JlDyXISZ8PkJezdXZvgtlGhLX5QQGjtHE is a m.room.member leave event with 3 auth events:

  • $DbUCN7-NQUcrLVaPujgz7c2vzrcdwNCPNBApdVdkS7k, the initial m.room.create
  • $nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8, the missing event
  • $N56CBQ49qENf6gVCBAYPF8nyWMEUiiz1XdSY8ZBsqjs, an m.room.power_levels

$nl9YxWizLH4RdEp1COwjbm1Pstit36kVuT2Svg3SLR8 should be the corresponding m.room.member join event. But none of the homeservers I tried joining via seem to have it.
There is one previous m.room.member join event, but its id is $u3HAePbjnIxL9mkmfAj3VwYBAAoj25Fqlv2jbB0CFoE.

@cremesk
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cremesk commented Apr 8, 2022

this is all very strange :|
joining the room is a pretty big challenge xD

@squahtx
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squahtx commented Apr 8, 2022

Apparently we tightened up the integrity checks for joining rooms at some point in the past, which is why existing homeservers can participate in the room, but new ones can't join. There's not much that can be done, except recreating or upgrading the room (/upgraderoom 6 in Element Web)

@cremesk
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cremesk commented Apr 8, 2022

okay many thank for your help @squahtx !
I'll talk to the room admins.

we can probably close the issue at this point.

@cremesk cremesk closed this as completed Apr 8, 2022
@squahtx
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squahtx commented Apr 8, 2022

I forgot to mention: upgrading the room will create a new room and attempt to invite all members. The new room won't contain message history, but will contain a link back to the old room.

@richvdh
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richvdh commented Apr 11, 2022

related to #9595.

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