Q. When editing and saving an existing product, I am getting the message 'product already exists.' How can I edit the product?
A. This message can happen when the product is in an inventory department that has a space at the end of the Department ID.
To fix this issue, edit the inventory department at Accounting / Setup / Inventory Departments. Delete the blank space(s) at the end of Department ID, then save the department. You should be able to successfully edit the product.