The project manager should first perform an impact analysis with SMEs to assess the potential effects of the separate project on the network upgrade. This will help the project manager to determine the magnitude and probability of the risks, as well as the possible responses and contingency plans. The impact analysis is part of the Monitor Risks process, which involves tracking the identified risks, monitoring residual risks, identifying new risks, and evaluating risk process effectiveness1. Informing the government representative, implementing a change request, and updating the risk register are all possible actions that may follow the impact analysis, but they are not the first thing to do. References: 1 PMBOK Guide, 6th edition, page 452.

The project manager should take proactive steps to restore the team morale and trust after an incident that affects the team dynamics. Hosting a special meeting to talk about what happened is a way to facilitate open communication, address the root causes of the conflict, and resolve any issues or grievances among the team members. Conducting a team-building workshop is a way to enhance the team cohesion, collaboration, and performance by engaging the team in fun and interactive activities that foster positive relationships and mutual respect. These two actions are consistent with the principle of leading with empathy and respect, which is part of the PMI Talent Triangle. References:
* PMBOK Guide 7th Edition, page 133
* Agile Practice Guide, page 48
* PMI Talent Triangle 1

The project manager should have established ground rules before the discussion started. Ground rules are essential in any meeting to ensure that everyone understands the expectations and guidelines for the meeting.
They help to manage the behavior of the participants and prevent personal arguments. Ground rules could include respecting others' opinions, avoiding personal attacks, and focusing on the issue at hand. By setting these rules, the project manager could have prevented the situation where stakeholders were in constant disagreement and using personal arguments to support their position1234. References:
https://www.apm.org.uk/blog/secrets-of-successful-stakeholder-management-as-a-project-manager/
https://www.teamgantt.com/guide/stakeholder-management

During a digital transformation, it's important for a company to update its performance measuring system to align with the new agile approach12. This involves shifting from traditional performance indicators like scope, cost, and schedule, to value-based measurements such as objectives and key results12. This approach allows for more flexibility and adaptability, which are key characteristics of agile methodologies12. It also encourages a focus on delivering value, rather than simply meeting predefined targets12. References: Toptal Guide, Third Stage Consulting

According to the PMBOKGuide, the project manager is responsible for managing the project scope and ensuring that the project delivers the agreed-upon features and functionality (Section 5.1). If a stakeholder tells the project manager that the main requested feature in the contract is not applicable, this means that there is a significant change in the project scope, which may affect the project cost, schedule, quality, and customer satisfaction. The project manager should not ignore this information, nor should they ask the sponsor to close the project or pay the penalty, as this may damage the relationship with the customer and the reputation of the organization. Instead, the project manager should check with the team to learn what can be done, and consult an expert if needed, to find out the impact of the scope change and the possible alternatives. The project manager should also communicate with the stakeholder and the sponsor to understand the reason for the scope change, and to negotiate a mutually acceptable solution. This is also consistent with the Professional in Business Analysis (PMI-PBA) Examination Content Outline, which states that one of the tasks of a business analyst is to "assess the impact of a proposed change or solution on the business need, requirements, and stakeholder expectations" (Task 3.4). References:
* PMBOKGuide, 6th Edition, Section 5.1
* Professional in Business Analysis (PMI-PBA) Examination Content Outline, Task 3.4