diff of CREATE OR MODIFY DEMO USER shows other demo users changing #1701

What happens: for CREATE OR MODIFY DEMO USER 'x' on an existing user, mxcli diff shows changes on DemoUsers[1].Password, DemoUsers[1].UserName, DemoUsers[2].Entity and so on. Exec moves the modified user to the end of the list.
Expected: modify the user in place, or diff demo users by user name.
Version: 0.28.0.

Mendix 11.12.4.