In the Parts Only BOM of the main assembly, components 004, 005, and 006 have item numbers 4, 5, and 6 (after the dot symbol). Item numbers of components 004, 005, and 006 in the parts-only BOM view in subassembly 010 are 1, 2, and 3.
Parts-only main assembly BOM before applying the command
Parts-only subassembly BOM before applying the command
Parts-only subassembly BOM after applying the command
After running the command, the parts-only numbering in the subassembly matches the parts-only numbering of the main assembly. The subassembly file is physically modified by the command.