my trick it usefull to avoid redetailing, but still need modification in some style (PartList and Balloon)
1. Open your Main Assy, Open BOM. In BOM add Custom iProperties Columns, then add new property call that name "DummyItemNo"

2. In BOM Structured View All Level, expand all node. Copy all Item (selected like dragging in excel), then paste to DummItemNo Column

3. Save all at Main assy.
4. open you drawing, now you must edit the PartList Style and Balloon style.
a. For partlist, open Style Editor in Manage Menu, search you partlist style, make copy for default partlist

b. Replace existing Property "Item" with new Property "DummyItemNo


c. Do the same step for Balloon Stlye.


After all set, change existing partlist style with new partlist style (Select partlist first) in Menu Annotate>Format
do same step to balloon in existing detail drawing.
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