When I generate a detailed cutlist BOM, it includes a numbered line for each sub-assembly (and child parts thereof).  Is there any way to prevent the headings from getting numbered?  I'd still like to include the rows as they provide handy grouping, I just don't want them numbered.

My document structure is:

Top level (assembly) --> West Unit (sub-assembly) --> Left Post (part) --> individual cutlist items

I tried this [2012 SolidWorks Help - Removing BOM Item Numbers from a Row‌] but I don't see the "Hide Item Number" option since it's an auto-generated row.