Failed to grant owner error in jicofo ChatRoomRoleAndPresence logs

So I found below error log in my jicofo logs. Has someone seen this error? Can someone help me regarding this?

Jicofo 2020-08-12 17:34:56.966 SEVERE: [30] org.jitsi.jicofo.ChatRoomRoleAndPresence.log() Failed to grant owner status to 58ff7b85-51ed-43fa-9b8a-d19a3ac8284a@newton-jitsi-meet.theboloapp.com/1TgT8eym
java.lang.RuntimeException: Failed to grant owner: <iq to='focus@auth.newton-jitsi-meet.theboloapp.com/focus35193334613483' from='meeting-207o0smpm9@conference.newton-jitsi-meet.theboloapp.com' id='7OBYv-21363' type='error'><error type='modify'><not-acceptable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/></error></iq>
	at org.jitsi.impl.protocol.xmpp.ChatRoomImpl.grantOwnership(ChatRoomImpl.java:808)
	at org.jitsi.jicofo.ChatRoomRoleAndPresence.grantOwner(ChatRoomRoleAndPresence.java:332)
	at org.jitsi.jicofo.ChatRoomRoleAndPresence.checkGrantOwnerToAuthUser(ChatRoomRoleAndPresence.java:357)
	at org.jitsi.jicofo.ChatRoomRoleAndPresence.memberPresenceChanged(ChatRoomRoleAndPresence.java:163)
	at org.jitsi.impl.protocol.xmpp.ChatRoomImpl.lambda$notifyMemberJoined$1(ChatRoomImpl.java:917)
	at java.util.concurrent.CopyOnWriteArrayList.forEach(CopyOnWriteArrayList.java:895)
	at org.jitsi.impl.protocol.xmpp.ChatRoomImpl.notifyMemberJoined(ChatRoomImpl.java:917)
	at org.jitsi.impl.protocol.xmpp.ChatRoomImpl.processOtherPresence(ChatRoomImpl.java:1212)
	at org.jitsi.impl.protocol.xmpp.ChatRoomImpl.processPresence(ChatRoomImpl.java:1261)
	at org.jivesoftware.smackx.muc.MultiUserChat$3.processStanza(MultiUserChat.java:251)
	at org.jivesoftware.smack.AbstractXMPPConnection$6.run(AbstractXMPPConnection.java:1263)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

The focus user is not admin, probably you are missing this config https://github.com/jitsi/jitsi-meet/blob/master/doc/debian/jitsi-meet-prosody/prosody.cfg.lua-jvb.example#L63

thanks will have try it.