Why is the error 'Account already exists with this pan for a different client code' displayed when opening an NRI account?

The error is displayed in the following scenarios:

• If the PAN is mapped with the resident individual account opening process: In such cases, the PAN must be unmapped from the resident individual account opening process. To unmap the PAN, please create a ticket with PAN, email and registered phone number. The PAN will be unmapped after 48 hours, after which an account can be created by visiting nri.zerodha.com/login#signup.

• If the client has a resident individual account: In such cases, clients are requested to convert their resident account to an NRI account. To learn how to do so, see Can an existing Zerodha account be converted to an NRI account?