In experienced project manager has never managed an agile project until now.

 In an agile project, the scope is not fully defined at the beginning. Instead, it evolves as the project progresses. This approach allows for flexibility and adaptability to changes, which is a key characteristic of agile methodologies. Therefore, the project manager should start executing the project, understanding that the scope will be defined and redefined throughout the project. References: Project Management Professional (PMP) Reference Materials source and documents: PMI - Project Management Professional (PMP), PMI - PMBOK Guide and Standards, Professional in Business Analysis Reference Materials study guide: PMI - Professional in Business Analysis