I try to register the Cd key of the Stormblood Collector Edition i bough with the Pre-Order on steam, but i get this message:

The entered code is invalid.

What is strange is that the Stormblood Pre-Purchase Bonus Content Cd Key worked though.

Did i do something wrong? I used the Item Code Registration page on Mogstation. Maybe i need to go to a different page, i need help here please.