A PSN account and a Gryphline Account can be linked if one of the following conditions is met:
1. The PSN account has never logged into the game; or
2. The email address has never been registered with a Gryphline Account.
 
The steps are as follows:
1. If the PSN account has never logged into the game, you can link the email address of an existing Gryphline Account to that PSN account.
2. If the email address has not been used to register a Gryphline Account, you can link it to a PSN account that has already logged into the game. The email address will then be automatically registered as a Gryphline Account.
 
The following cases do not meet the linking requirements:
A PSN account has already logged into the game, and the email you attempt to link is already registered with a Gryphline Account.
This is because the first time a PSN account logs into the game, a Gryphline Account is automatically created for it. That PSN account cannot later be linked to a different existing Gryphline Account.
To link a PSN account that has already logged into the game, you must use an email address that has not been registered with a Gryphline Account.