Your question is Soft Delete with Uniqueness. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
If a database field is set to unique and you need to implement a soft delete while allowing a new record with the same value, how would you architect this solution for a FSoft Pty backend service?