Comment 3 for bug 357307

This happens when someone tries to register a new LP account using an email address that is associated with a personless (SSO) account.

I think this is a good indication that the person hasn't realized they can use their SSO account to log into LP, and if we let they proceed we'll have to change the password of the account to what they specify in the last step of the workflow. That may cause problems to those users when they need to use their SSO accounts in the future in case they've chosen a different password (than the one used when creating the SSO account) when registering into LP.

In cases where people try to register into LP with emails associated with personless accounts, I think we should instead stop the registration as early as possible and tell these people they can just use their SSO accounts to log into LP. (When they first login we'll create the Person entry if it doesn't exist already)