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Over the past week, some of our users have encountered a known error when saving Guild Wars 2. This issue occurs for a number of reasons. Let’s discuss this now.
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The undefined error usually occurs because the email is already registered (either for gw2 or gw1). In a previous answer, you noted that someone used an auto-genered password and still didn’t delete the email, so I just want to point it out. If you use Gmail, someone might use 
