The breach occurred due to a technical error that allowed unauthorised access to a database containing the keys. The Bank of England has taken immediate steps to secure the database and prevent further breaches. Affected customers have been notified and advised to change their PIX keys as a precautionary measure. The Bank of England is working closely with law enforcement agencies to investigate the incident and identify the responsible parties. The Bank of England takes data security very seriously and is committed to protecting the privacy of its customers. The Bank of England has implemented robust security measures to prevent data breaches, and is constantly reviewing and updating these measures to ensure the highest level of protection. The Bank of England encourages all customers to take steps to protect their personal information, such as using strong passwords and being cautious about sharing personal information online.