Discrepancy between BOM component in Collection and Plan

Dear Friends,

In the collected data in ASCP, in Find Item option I could see an item-‘P’ and in the components there is a component item ‘C’

Whereas in Plan output in Planner Workbench, in Find Item option, I could see the same item-‘P’ and in the components, the above component item – ‘C’  is not present.

In Plan, in Find supply/demand for the item-‘P’ and component item – ‘C’ is queried, demand for both the items were shown earlier,

but now demand for component item – ‘C’ is not shown, due to this issue.

This is happening for this -'P' Bom only and not for any other BOM or item.