Planning is considering Phantom supply item Lead time

Hi SMEs

We have a sub assembly(make item) it is stockable and assigned  as sub-assembly in one Finished good with supply type is Pull. But same one is assigned in another Finished good bill with supply type is Phantom.

When we ran plan, the Phantom supply type finished good is considering the sub assembly's lead time for offset. The requirement is it should not consider lead time while its supply type as Phantom

Our business didn't like to keep separate item for both. How can we achieve this. Any one has faced similar kind of issue, what kind of fix will work for not considering Phantom supply type item.