diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0dbd94bc..523eb6b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@
 
 * Fix mod_muc_slow_mode: add min value for slow_mode_duration field.
 * Debug Mode: new option to promote some JIDs as admins on the MUC component.
+* Fix #322: "Sepia is no longer an owner of this groupchat" message when joining the chat.
+  * This was related to the fact that the bot was owner because of the "admins" Prosody config key, and not registered in the room.
+  * To fix it, i added the bot as owner when creating rooms.
+  * This means that the fix only work for newly created rooms.
+  * There might still be an issue in ConverseJS or Prosody, don't know exactly where.
 
 ## 8.3.1
 
diff --git a/server/lib/prosody/config/affiliations.ts b/server/lib/prosody/config/affiliations.ts
index 2c09945e..4ad17bc8 100644
--- a/server/lib/prosody/config/affiliations.ts
+++ b/server/lib/prosody/config/affiliations.ts
@@ -1,6 +1,7 @@
 import type { RegisterServerOptions, MVideoThumbnail } from '@peertube/peertube-types'
 import { getProsodyDomain } from './domain'
 import { getUserNameByChannelId } from '../../database/channel'
+import { BotConfiguration } from '../../configuration/bot'
 
 interface Affiliations { [jid: string]: 'outcast' | 'none' | 'member' | 'admin' | 'owner' }
 
@@ -26,6 +27,15 @@ async function _getCommonAffiliations (options: RegisterServerOptions, prosodyDo
     r[jid] = 'owner'
   }
 
+  // Adding the moderation bot JID as room owner.
+  const settings = await options.settingsManager.getSettings([
+    'disable-channel-configuration'
+  ])
+  const useBots = !settings['disable-channel-configuration']
+  if (useBots) {
+    r[BotConfiguration.singleton().moderationBotJID()] = 'owner'
+  }
+
   return r
 }
 
@@ -55,7 +65,7 @@ async function getVideoAffiliations (options: RegisterServerOptions, video: MVid
   const prosodyDomain = await getProsodyDomain(options)
   const r = await _getCommonAffiliations(options, prosodyDomain)
 
-  // Adding an 'admin' affiliation for video owner
+  // Adding an 'owner' affiliation for video owner
   if (!video.remote) {
     // don't add the video owner if it is a remote video!
     await _addAffiliationByChannelId(options, prosodyDomain, r, video.channelId)