(adsbygoogle = window.adsbygoogle || []).push({}); I tried to deactivate ps3 from this account but i get this does this mean i cant or its been done already?
How to Deactivate a PlayStation®3 System
You can only deactivate your PlayStation®3 system from PlayStation®Network using your PS3™ system. You cannot deactivate it using a PSP® (PlayStation®Portable) system or PC.
On the XMB™ menu, go to PlayStation®Network and sign in to your PlayStation®Network account.
Go to Account Management > System Activation > PS3™ System.
Select the type of content you no longer want your PS3™ system to use.
Highlight [Deactivate System] and press the X button. Your system is now deactivated.
Highlight [OK] and press the X button.

If you are doing it online via SonyEntertainmentNetwork.com or whatever then yes. However it wasn't too clear which way of deactivating your account you approached... i.e via online or on console.

I never really deactivate accounts via my console since I usually have another friend on it so I have to do it online. But I will take a whack at it... Your account has already been deactivated from that console. And I can only assume this because of the error message you've received.

To reassure that all consoles has been deactivated from your account try using this and check your devices... You must login or register to view this content.

Hopefully I helped you out!