Old sales document print preview showing updated HSN code

Hello Experts,

One of our clients has a requirement that is, instead of old sales document output showing new updated HSN Code (updated through material master) which is what happens in standard, it should reflect old HSN Code that was there before HSN code change. Please enlighten me how is it possible to implement? The new or future sales document should have those updated HSN codes not the old and outdated sales document