Message 'Product Already Exists' While Editing an Existing Product

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.