YubiKey 5C NFC with LastPass
I'm brand new to the security key / passkey space. I just bought a 2-pack of the YubiKey 5C NFC keys. I want one on my key ring, and the other in my safe. It make sense to me that I have to set up both keys separately for any account I want to protect.
Under LastPass' Account Settings > MultiFactor Options there is a section for Yubico OTP. However, it's description says:
"Use an older YubiKey device that only supports Yubico OTP. To use a newer YubiKey device, go to LastPass MFA (above). Pro tip: This is also where you set up YubiKey for LastPass mobile app verification."
When I use the LastPass MFA option, it walks through setting up a Primary and Backup method, but it registers both options on the first YubiKey (FIDO2 as Primary and a different protocol as Backup). If I walk through the process a second time for the second key, it overwrites the first key which no longer works to access LastPass.
Should I be using the old Yubico OTP option for Lastpass authentication instead?