No, he hasn't. Never try to use those AI generated answers, because they simply don't help. They take a part of what you are asking and make a lot of assumptions. It's just trying to get as many helpfuls as possible, without the person posting them even knowing what they are doing. This is the worst development on the community recently.

But I guess some other functionality is in place, taking care of your records. You need to check business rules, flows and workflows that are active on Request and Requested Item. You will need to inactivate the current logic of setting it to 'complete' so your own logic to set 'incomplete' will work.