Not able to modify Vacancy Status of a Position in TeamManager

Dear Experts,

We are on Nakisa 4.0 SP1 Build 0910021000 for TeamManager.

I created a position under an OrgUnit. The position got created and I maintained the vacancy details with 'Open' status. Now I want to modify the vacancy status but Im encountering an error 'No infotype record exists for given key fields' which appears strange to me. I can able to 'Add' a new record and able to 'Remove' the existing record but not able to modify.

Below are the screen shots.

New Position

Vacancy Information

Clicked on Modify and given  a New future date/past date but system giving error

Your suggestions would be appreciated.

Thanks,

Manohar