How can you stop dependent demand on planned WO orders that are ignored?

We have a situation where after running MRP a PWO message is also creating PWO for the dependent items.  The planner wants to ignore the PWO message on the top level parent item.  Then when MRP is ran again on net change another PWO is created for the top level  parent item and the dependents. 

My first thought is to fix the demand that is causing MRP to continuously create the PWO on the parent.  However fixing the demand in not an option.

My next thought is to Run MRP on level 1 items.  Firm up the WO's. then run net change.  Some of the dependent items are also level 1 items so we would have to assign a Cat Code to the Top level 1 items and run net change with a data selection to exclude those top level 1 items.