How does the Estimate of Impacted People parameter get added to Back Out Life Events process?

We need to back out an administrative life event for the company, but it errs out immediately after submitting it with the following error: ORA-20001: This process affects the enrollments of #### people, which exceeds 5% of your estimate. You need to enter a new estimate and try again. This is a new field added in 25C, but it is not available in any of our environments. I have logged a SR for it, but was hoping that someone else had figured it out.