i cannot remember my old iphone passcode
I am being asked to "Update Apple ID Settings". It says some account services will not be available until you sign in again. I click "Continue", I enter my Apple ID Password, press Sign In, I enter my current iPhone Passcode, and then it asks me to Enter my Old Passcode (6 digit passcode). I don't remember my old 6 digit passcode or if I even had one so I click "Forgot iPhone Passcode?" It says I can "Use Other Device" or "Reset Encrypted Data" (which I don't want to do) so I click "Use Other Device". "Approve This iPhone" screen comes up saying go to your other devices signed in to iCloud to approve this iPhone. I sign into iCloud on my PC but I don't know what to do next.
Please help!
iPhone 6