481622 - MODIFICATION_FAILED when drag&drop a task to a Calendar day's box

Status: RESOLVED DUPLICATE of bug 474192

(Calendar :: Lightning Only, defect)

Description

[HasanK]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6
Build Identifier: Thunderbird/2.0.0.19 - Lightining/0.9

On Lightinig plugin, when I try to drag&drop an existing task (from listed in right frame) in calendar window (on middle frame)an error pop up window come up and say :

"An error occurred when writing to the calendar Home!"
In Deatils : "MODIFICATION_FAILED"

Reproducible: Always

Steps to Reproduce:
1.Click "Tasks" on bottom of left frame
2.Create new Task
3.Click "Calendar" on bottom of left frame
4.From right frame click on a existing task and drag&drop it on a day box

Actual Results:  
Error Pop up comes!

Expected Results:  
Edit the task's start&stop date and add it to calendar