Sounds like a case of bad primary key selection to me. The old username problem is serious though. There should be a deactivation window even if it's to let the original user reclaim the used username... so long as the primary key is the same.
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Sounds like a case of bad primary key selection to me. The old username problem is serious though. There should be a deactivation window even if it's to let the original user reclaim the used username... so long as the primary key is the same.