SKUs in LVK sync from your store platform. To change the SKU on a product that already exists in LVK, update it on your store and the change flows through to LVK automatically, usually within a few minutes.
Important
If your inventory is already at the LVK warehouse, or if you have already created a shipping plan, email support@lvk.com before you change the SKU. The team needs to know about the change so your inventory imports correctly.