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Other than a firmware issue could be a dirty or scratched disc. Try to clean it and see if this solve.
Another cause could be a damaged disc. Even pressed media can be defective. Try to read that disc with a different drive. If you have problem on that disc also with different drives, then the disc is damaged and you should get a RMA.
If this issue is present only in the Sony drive, it's possible that your drive is starting to become damaged. In this case, you need a new drive.