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Is there a way to delete her PSN account from my PS3 account without losing anything?
There is a way to remove a user from a PS3 console, but you will lose the following:
Paid Content Downloaded from PlayStation Network
The account that bought the content can still download it from another console
Your console however, will be unable to use the content ...
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It's the Manufacturing Code:
Printed on the discs or packaging of Sony DADC-manufactured CDs are
codes indicating master copies (matrix numbers) of discs. These codes
begin with a 4-letter prefix followed by a series of digits.
In your case:
BPDL - PlayStation 3 Blu-ray Disc Dual-layer titles
As I cannot find any other information, I'm guessing ...
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