I have an old PSN account linked to my Bungie account. I don't remember the PSN account's password and the email for that accout no longer exists. I want to get that account unlinked and link a new one.
First off, everything you need is located [url=http://www.bungie.net/en/Clan/Post/18405/64336042/0/0]in this thread[/url]. However, you will not be able to unlink authentication methods UNLESS you can sign in to them through the email/pass credentials. If you cannot log into that PSN account, you would have to troubleshoot gaining that access back with [url=https://support.us.playstation.com/app/contact_options]Sony Support[/url]. Then you'll be able to swap out authentications.