I contacted the support about this and they told me 2 things:
- They cannot add the achievement(the one requiring that item and the others connected to it)manually
- The achievement may be moved to legacy achievements (instead of, you known, fixing it)
The weird thing is one of the beers from Rootstock has literally no use(Description says it just makes you dizzy), which was the perfect solution for an item you don't want to have any more effect but you want to keep it usable for the sake of the achievement, I have no idea why they didn't make the same with Sky Lotus drink...