PMP Practice: Prioritize critical impediments, obstacles, and blockers for the team

River Okonkwo is the scrum master for Ubuntu Freight Corp, an indie game studio developing a multiplayer battle arena game. During sprint planning, the development team identifies that the legacy animation system is causing significant slowdowns—rendering tests now take 4 hours instead of 30 minutes, and three developers are blocked waiting for results before they can proceed with their tasks. The team proposes dedicating the entire sprint to refactoring the animation system. However, the product owner, Birch Petersen, insists the team must deliver two high-priority marketplace features this sprint because a major gaming convention is in three weeks, and the marketing team has already committed to demoing these specific features to potential publishers. Both the technical debt and the marketplace features are legitimate priorities. What should River do?