425914 - When receiving updated meeting requests, calendar says already actioned but doesn't update calender event. Further invites do not get actioned

Status: RESOLVED DUPLICATE of bug 361635

(Calendar :: E-mail based Scheduling (iTIP/iMIP), defect)

Description

[Nick Harness]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13
Build Identifier: Thunderbird v 2.0.0.12 with Lightning extension with Noia 2.0 eXtreme 3.3 theme

If I receive a meeting update, I receive the message: Invitation could not be processed Status 2152333316. Details:ID already exists for addItem .
Once this had been shown, future unrelated meeting requests could not be actioned or automatically added to calendar if accepted, although acceptance e-mail still sends.

On meeting requests I want to send, I add attendees and tick send e-mail but no meeting request is sent.

Reproducible: Always

Steps to Reproduce:
1.click on update meeting e-mail
2.Accept update
3.Receive error message
Actual Results:  
Receive error message as stated

Expected Results:  
Any updates should be shown in calendar as accepted and updated