Update Named BOM to Latest

I am new to EPDM and this is my first posting. Hopefully my question isn't too obvious. I have searched the Knowledge Base to no avail... How do I update a Named BOM to the 'Latest' version of an assembly? I can update it if the assembly is rebuilt but as our assembly is quite large I would like to update the Named BOM without rebuilding the assembly. I look forward to your insight.

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