It's nice to see you again, @Caroline69.
You should be able to change the SSP figure by overriding this manually. Since you're getting this prompt, I'd recommend reaching out to our Payroll Support.
This way, they can access your account in a secure environment and check this further using their tools. You can check this link on how to reach them: Desktop Payroll Support.
Let me know if you need anything else. I'm here if you have follow-up questions. Have a good one.