One more +1. Paypal, please be professional about that issue. Giving ability to add only one key is simply not acceptable from security POV. I give you good example: Apple requires (mandatory!!!) at least 2 keys for iCloud 2FA - exactly because having one is not secure, it can be lost. https://support.apple.com/en-us/HT213154 You are not amateurs, are you?
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