SAP SAC: Version Management in a Plan Model

Hi Gurus,

I am creating a blank Plan model in SAC> I have created all the dimensions for Acc, Region, Prod.

Now i am trying to import the transaction data from 2 flat files. My flat files contains the below headers:

My question is, when i try to map the version dimension, it only displays 'Actual' as a version for both the flat files.

My question is, where do i have the option to manage the Version dimension? i would like to add 'Forecast' in the ID column of Version and load the data, but unable to do so.

Please advise.