Seems that a doctor can create a client but eventually it fails

[Espurna]

Steps to reproduce

1- Log in as a Doctor
2- Go to clients list and click on "add" button
3- It seems that you can create a Client.
4- Once you save the changes the system rises an error

Current behavior

A doctor can access to the Client's creation page, but it rises an error when he/she creates the client object

Expected behavior

A doctor should not be able to create a client or has the option to create one

Screenshot (optional)