[2020-03-31 04:14:15:368] [SEVERE  ] [message-carbons-proc-0 ] WorkerThread.run()               : tigase.server.xmppsession.SessionManager$ProcessorWorkerThread,(message-carbons-proc-0) Exception during packet processing: from=sess-man@ip-10-0-10-106.us-west-2.compute.internal, to=sess-man@ip-10-0-10-106.us-west-2.compute.internal, DATA=[message xmlns="jabber:client" type="chat" id="48792FC3-AFA9-45A2-A4EA-7E50D35BEB09" from="andrzej.wojcik@tigase.org/MacBook Pro (Andrzej).local" to="bmalkow@malkowscy.net"][body]…[/body][active xmlns="http://jabber.org/protocol/chatstates"/][origin-id xmlns="urn:xmpp:sid:0" id="48792FC3-AFA9-45A2-A4EA-7E50D35BEB09"/][request xmlns="urn:xmpp:receipts"/][/message], SIZE=387, XMLNS=jabber:client, PRIORITY=NORMAL, PERMISSION=ADMIN, TYPE=chat, STABLE_ID=dc238233-fab0-49b2-8867-0c6672173bb2
java.util.ConcurrentModificationException
	at java.base/java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:970)
	at java.base/java.util.LinkedList$ListItr.next(LinkedList.java:892)
	at tigase.xml.Element.getChildStaticStr(Element.java:552)
	at tigase.xmpp.impl.C2SDeliveryErrorProcessor.isDeliveryError(C2SDeliveryErrorProcessor.java:95)
	at tigase.xmpp.impl.MessageCarbons.process(MessageCarbons.java:169)
	at tigase.server.xmppsession.SessionManager$ProcessorWorkerThread.process(SessionManager.java:2638)
	at tigase.util.processing.WorkerThread.run(WorkerThread.java:67)