Manually add Special stock indicator in production order component (Not an MTO)

Hi,

     I'm trying to artifact the Production bid components nether immoderate peculiar stock. There's nary Sales order, its not an MTO. I'm reasoning of having the constituent blocked nether "project stock" by creating a dummy project. I created a dummy task , assigned the WBS constituent successful the Production bid and tried to participate peculiar banal indicator arsenic 2 (Project Stock),but it disappears erstwhile I effort to prevention it. 

Could you assistance maine recognize however I tin support it arsenic Special Stock 2 (project stock) for the components.

The idiosyncratic corporate request benignant is acceptable arsenic 1(individual) successful MRP 4.

Thank you.