Preconditions:

• Added product type
• Added product based on PT (step 1 preconditions) with defined 'code' value as code01

Steps to reproduce:

1. Log in to back office.
2. Go to Product catalog / Products / {product}
3. Edit product and change code value to code02
4. Save the product.
5. Edit the product once again and change 'code' value to code01
6. Save the product.

Actual result:

See attached screenshot.

Cannot edit 'code' value to previously used.

Product code must be unique

Expected result:

User can change 'code' value to previously used if there is no product in product catalog which use that 'code' value.