I have 2 projects. project A and project B. Both have a dedicated board. I also have a sprint. I have removed all 'project B'-issues from that sprint. The sprint now only contains 'project A'-issues. Still, the sprint stays visible on my 'project B'-dedicated board. I fear that, if I delete the sprint, the sprint will be deleted completely, which means I also no longer see it on my 'project A'-dedicated board. How do I get rid of this sprint only on my 'project B'-dedicated board?