2) I know that but the GTIN is different per variable. In this way you only have one fixed GTIN for all the variations.. But I don’t understand that all other input fields such as price, SKU, Quantity in stock etc. work for variable products, only the GTIN does not.. Do you have an idea where the problem lies?
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.