Inventory workday calendar field is greyed out in oracle inventory parameters while defining new org

Hi Gurus,

I need your suggestion on following issue.

Issue is, Inventory workday calendar field is greyed out in Inventory organization parameters window, while defining new inventory organization in vision instance 12.1.1.

Basically I have defined new Business Group, General Ledger, Legal Entity, Operating Unit and

I have created workday calender and Build it, the build program got completed successfully.

While Creating Item Master Organization, In the Inventory Parameters, calender field is greyed out and even if it in greyed out mode, I can save the inventory Parameters.

Please suggest how to get it enabled.

Thank you very much in advance.