在Customer Feedback要註冊匿名帳號時都會出現這個錯誤訊息,Forget password的功能正常,可以正常寄出email,但就是沒辦法註冊匿名帳號,請問是我有設定錯誤嗎？

Error occurs while performed the operation.

There is another User [b7403052000@yahoo.com.tw] in the system.