Stocks by attributes

[joystick]

Ok, installed. To test contrib, I try to set size options and apply size attribute to an article. I set quantity in stock... Well! It work!



But it's very strange that PWA_DELETE_VARIANT doesn't work. I clik on it, I click yes to confirm, I've not any error message but variant is already present.

I've another question: I set variant and stock. Is it a problem or is it VERY dangerous to remove a relative Option Value (look the picture) for example "Taglia 26", from attribute applied to an article (Admin-->catalogue-->Attributes Controller) ?