Hello. I have a free Trello account, which I started many years ago for a church project. Today, for a different type of project, I want to copy a board that was recently shared with me. And I want to create a new workspace where I can store the board copy. I keep trying to copy the shared board and get this message: "This free workspace is over the 10 collaborator limit." So I removed myself from the church board. However, I still cannot copy the new board, and I cannot delete the church workspace. Please advise.