Upwork Customer Support can probably help you use the client aspect of your Upwork account.
But in all seriousness, I wouldn't worry about it.
If you just ignore it, it isn't going to do anything.
As or me: My use of my client aspect has led to me earning much more money as a freelancer. Because I have a far greater understanding of the client perspective. And for other reasons. I have hired Upwork freelancers to help me produce promotional work for my profile page.
You don't really benefit in any way by getting rid of your client aspect. But you might benefit by actually using it.