If you delete your password after setting up a passkey, you may not be able to sign in on devices where the passkey has not been registered.First, check whether you are using the same device on which you originally set up your passkey.
If you want to use a passkey on another device after deleting your password, follow these steps:
(1) Sign in to your Yu ID account using the device on which your passkey is registered, and reset your password.
(2) On the device where a passkey has not been set up, sign in with your password and then register a new passkey.
<Related questions>
Q. Is it necessary to set up a passkey again after changing devices?