Spare knuckles now included in kit?

[Rhialto]

In the package, there is a 4 spare knukles with a note about they know original knuckles production have a problem and they ask to replace them with those reinforced one instead.

So I guess I'll use the one that come installed and will keep the new one as spare instead of doing the swap and throw originals in garbage.

Since how long they add this replacement knuckles kit? Anyone know? Is this an old kit? Maybe newer kit come with knuckles already replaced in factory? Just curious...