A single person cannot setup or change the partnership's SSD because both partners have to confirm and agree. North or East fills it in and South or West confirms.
If your bridge partner and you already have set up an SSD (or an SSD is created with any other player that you played with), then it is not needed that you set up a separate SSD.
If you click your bridge partner's profile and see an SSD symbol then, if you click that symbol, you see the SSD which is setup for you and this partner.
With a different partner you will or can have a different agreement, and therefore a different SSD.
If you want to amend an existing SSD with a partner, you can do this at your leisure in ''The Office''.
Both of you have to be present and sit opposite at a table there and you can change your existing SSD, till it is exactly what you want.
See also the link on our home page [Simple System Disclosure (SSD)]
Online Server > To enter the Dido Tourney, submit an SSD. Note you are committing yourself to play 4 boards here.
And on the Screen will appear the following Dialog Box with your Alias and your Partner's Alias at the top. This you need to complete by scrolling on the arrowhead at the right on each of 5 lines and then Submit:
Please complete and then Submit for partner to agree. Partner (who will beSouth or West) will see the following:
When Partner has confirmed that this is your system - or Declined it for alteration and then subsequently Confirmed it - you will be ready to play (perhaps waiting for your opps to confirm their system)
You only have to prepare an SSD once with each of your partners after which the Server saves it for you.