shadowrun sr5 – Do the state-of-the-art armaments from Run & Gun labeled "Latest Models" lose the armor rating over time?

Relevant rule snippets from Run & Gun, p. 59


These elements are the latest incarnations of your company
Creator. That means they lose a little more if they are bought as
Slightly worn, namely 20 percent loss of armor (round
adjusted valuation upwards) when buying older models of clothing.


The "lightly worn" option offers runners the opportunity to buy
Some Primo equipment at a reduced price with some catches. Buy from
The section "Easily carried" assumes that the character Armand as
Contact with a loyalty of at least 2. When equipment is purchased Light
When worn, the character gets a 25 percent discount, but they only
Get the armor rating. You do not get any characteristics of the armor.
The "slightly worn" function can be purchased with the piece
of armor refit. A weapon master + logic (mental) (10, 1
Hour) Extended test and costs 10 percent of the original armament cost
for each feature the character tries to have restored.

Do I have to retrofit a newest model from time to time to prevent it from deteriorating into "lightly worn" and losing 20% ​​of its armor rating? Or does the newest model just mean that by purchasing the used version you are buying an older model that is not as good and is using the armor rating of -20% in addition to the lack of armor features from Lightly Worn?