If you select Do not change item
numbers in the BOM PropertyManager and you change the file name (for
example, using Save As or Replace
Component) within the referenced assembly, the BOM table retains the BOM
item number of the original component being replaced.
You can define how to handle replaced components in BOM table. In the BOM
PropertyManager, in the Keep Missing Item section,
Replaced components defines how to handle replaced components
when you select Keep Missing Item, regardless of the
Do not change item numbers setting.