The XXXXX-XXX-XXXXX-XXX is the preorder bonus code that needs to be used to redeem another XXXX XXXX XXXX XXXX XXXX code in order for you to get the preorder bonus items...
The XXXX XXXX XXXX XXXX XXXX is the game code you register on the mogstation...

To redeem the preorder bonus code go to
http://preorder.eu.finalfantasyxiv.com/
or
http://preorder.na.finalfantasyxiv.com/