Cost Group Comingling Error

Hi All,

Please help me out to avoid cost group co mingling error, PSB Case example

1. We are using Discrete Jobs for Manufacturing

2. BOM shares common parts

3. Supply sub inventory in WIP Parameters has different cost group then other sub inventories

4. Component Pick drop say XXX component has been dropped for Job1

5. Another component pick drop can also drop  XXX component as they are common parts

6.second pick drop is not allowed as cost group comingling can occur

7. Defined cost group rule to derive cost group from destination subinventory

8. Still we are getting same issue

Pls help me out how to configure cost groups