Customer created a Engineering Part (PDM) with Provide code “Make” and created the PDM Structure and Released. 

Later, use the same part in a delivery project hence the same part has been added in to Project Product/ Items Tab.  Then Copy structure and got the child components also from the PDM structure. Before do the engineering transfer or create inventory parts in respective sites, customer realized part provide code to be set as “Buy”.

Instead of changing it on Project Product/ Items Tab, Customer changed it on the Engineering Part itself. As a result, Part catalog, Engineering part revision etc. has been changed but not on the Project Product/ Items Tab and Project Item navigator. 

But if Customer change the Override Default Site, change reflect automatically but once it save again back to “Make”. 

I think there is a bug but not sure What is the functionality here.