Unable to create a subscription with
PLESK_ERROR: User account already exists
There is a system user with such name in the
# plesk db "select * from sys_users where login='j.doe'\G"
The system user with the name
j.doe already exists on a server and is assigned to a different domain
Either remove the system user from another domain in Domains > example.com > users, or create a new subscription with different sysuser name.