Explanation
= The project manager should contact the team member who shared the negative details and explain what information can be shared outside the team and what information should be kept confidential. This is to respect the privacy and trust of the other team members and to maintain a safe and collaborative environment.
The project manager should also contact the functional manager of the team member who shared the information and invite them to the next retrospective. This is to increase the transparency and alignment between the project team and the functional managers, and to address any issues or concerns that may arise from the performance feedback. References: = PMBOK Guide 7th Edition, Chapter 4: Team Performance, Section 4.3.2: Create a Safe Environment; PMBOK Guide 6th Edition, Chapter 9: Project Resource Management, Section 9.4.2.3: Ground Rules.