Verification asking for other iPhone passcode

I'm unable to transfer purchased tickets to my Apple Wallet because it's asking for my iPhone passcode (which I know) then asked for the passcode for the other iPhone. I'm the ONLY iPhone user in my family, so don't know what other code to enter or what Apple thinks should be a secondary validation.

If I click "Don't know iPhone Passcode" it says I can approve this iPhone from one of my other devices signed in to iCloud, or I can reset my end-to-end encrypted data. I've already logged into my Apple account on my computer.

Not sure how to resolve this, but reseting my end to end encrypted data sounds very extreme and I'm not sure what will be affected (lost?) by doing that.

Can anyone help?