Unable to equip Primordial Ashes-upgraded item

[Boubou-1741]

See:

'You cannot equip more than one.....'

I created a Primal Ancient Squirts amulet using the new Kanai’s Cube feature and the game will not allow me to equip it. I get the ‘You cannot equip more than one of these items’ error message. This also occurred when I created a Primal Ancient Stone of Jordan ring. Several resets of the game did not resolve the issue. Is this a bug or a new limitation?