It doesn’t seem logical to me that a shield made from the hardest steel ever weighs so little…
The Scorpion Ward has the same weight, I didn’t check other shields, but a scorpion’s carapace seems less heavy than the legendary Akbitanan steel to me?
It’s made of carbon fiber! 
I think devs should have lightness added as a legendary effect.
Looks like they just copy-pasted the Scorpion Ward’s stats on the Akbitanan shield. According to Wiki, those two shields have completely identical stats.
I don’t mind the weight change, but i’m kinda disappointed it’s no longer durable when it should be.