Problem with Sandbox, Page Composer changes - cannot revert

Summary:

Our business team has requested to make a rejection reason required when rejecting a candidate in ORC. So, I've made the changes via sandbox, Page Composer. The field is showing required now, but there is no way to revert the changes. Please advise if there is a way to revert.

Content (please ensure you mask any confidential information):

Our business team has requested to make a rejection reason required when rejecting a candidate in ORC. So, I've made the changes via sandbox, Page Composer per the steps below:

1. Open/Create a sandbox with the Page Composer tool enabled

2. Navigate to the candidate's profile and simulate a rejection but do not save the action