XenForo User upgrades did not process

[cwe]

I've had a bunch of new members migrating to one of my forums over the last couple of days. Many of them are purchasing membership upgrades (paid with PayPal) and most are getting promoted as expected.

I have 3 members that paid for upgrades, PayPal sent the IPN and my forum received them, but the payment provide log shows:

Payment: (Guest) Payment received, upgraded/extended.
PayPal User upgrades Today at 1:19 PM Unknown user
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If I click on the detail, it shows the ["payer_email"]...

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