A client's email address has changed and they can't access the old one - do I need to create a new client record?

No, you don't need to create a new record. Update the email address on the client's existing record instead.

How to fix it

1. Open the client record.
2. Go to Step 1: General Info.
3. Update the email address and save.

The client can then log in with the new email address using their existing password.