Update Metadata After Sale
Only updating names of traits are allowed, in case there are typos.
To do that, go back to Artworks - Settings, and you will be able to rename the trait.
If you have multiple traits in different groups that share the same name for merging purpose, you need to rename all of them, otherwise metadata might get messed up and unwanted changes may occur in rarity calculations.
No. To ensure the fairness for NFT holders, you may not update the artwork once they are generated.