PVP Weapon can not Add/Remove Augmentation

I'm using a pvp weapon S80. This weapon has augmented. I go to make the weapon up to PVP Weapon. After that, I can not remove the augmentation of the weapon U_U The system has an alert "This is not a suitable item" when I try to put the weapon into remove augmentation slot.

Is it a bug? Or PVP Weapon can not add/remove Augmentation right?

It's not a bug, don't pvp a wep until you're done with everything else you want to do to it.

As Retri said, when you put PvP on a weapon you freeze it, no more attribute / ls / enchant / sa can be added

Thank you U_U

Reputation Manager Rapidus in aden;

"Consider carefully before specializing an item for PvP as enchant srolls may still be used on it. Augmenting, soul storing attribute assigning or conversion to a Kamael weapon is not allowed"

Sometimes should read what NPCs tells you. :)