Which of the following is not a common post-change activity found in change management practices?

In change management practices, post-change activities are crucial for assessing the impact of the changes implemented and ensuring that systems are functioning as expected. Monitoring system performance is essential for verifying that the changes have not negatively affected system operations. Documenting changes captures the details of what was altered, which helps in maintaining a clear change history and aids in troubleshooting any issues that might arise later. Gathering user feedback is also vital as it provides insights into how the changes have been received and their effectiveness from the end-user perspective.

Updating contracts, however, is typically not considered a common post-change activity. While it might be necessary in certain circumstances, such as changes that affect service agreements or deliverables, it is not a standard practice following every change management process. This makes it less relevant as a routine follow-up task compared to the others mentioned, which are consistently necessary for ensuring the success and stability of the change.