We have two Scrum Boards that display two different backlogs. Board A and Board B. Board A has two project keys included in the backlog and Board B has one project key included in the backlog- no relationship with projects. I recently added the second project key to board A. After doing so, I created a sprint on Board A (Name: Sprint 9) and it is showing up on both boards (A&B). If we delete if from Board B it will remove it from Board A. Sprint 9 should only show up on Board A, not board B. Not sure what the issues is or how I can correct this. Any thoughts?