MTM Copy Tool is not working

Oct 13, 2014 at 12:25 PM
Edited Dec 8, 2014 at 12:25 PM
Tried to Copy Test Plan with its associated test suits from one project collection to another, but with no positive results. Every Time I click on start migration, its giving information in the log as:
Copy Completed!
Name: Priority, Reference Name: Microsoft.VSTS.Common.Priority, Invalid Value: Not Automated
Cannot Save Work Item - Stoping Migration
Starting Copy...

I would like to know, whether I am missing something or the tool itself has bug. (I am using Visual Studio 2012).

Thanks & Regards,
Jyoti Chakraborty

Note***There is an urgent requirement for this migration, because we are using a new project collection, where we have reuse some of the old plans and their corresponding suites which exist in different collection.

Please provide help on this ASAP