prevent traceback. Fixes #7053

src/common/connection_handlers_events.py

@@ -1203,6 +1203,7 @@ class DecryptedMessageReceivedEvent(nec.NetworkIncomingEvent, HelperEvent):
         self.forwarded = self.msg_obj.forwarded
         self.sent = self.msg_obj.sent
         self.popup = False
+        self.msg_id = None # id in log database
 
         self.receipt_request_tag = self.stanza.getTag('request',
             namespace=xmpp.NS_RECEIPTS)

src/session.py

@@ -74,8 +74,6 @@ class ChatControlSession(stanza_session.EncryptedStanzaSession):
             if self.control and self.control.resource:
                 self.control.change_resource(self.resource)
 
-        obj.msg_id = None
-
         if obj.mtype == 'chat':
             if not obj.stanza.getTag('body') and obj.chatstate is None:
                 return