When inactivating a task within MS Project, remove the predecessors and successors first. Check the logic of the related tasks to make sure they are properly linked to new/different tasks. Then inactivate the task.

Alluvionic News
Top PMP Study Tips: How to Study for the PMP Exam and Avoid Common Mistakes
Preparing for the PMP exam can feel overwhelming, especially if you are balancing work, family, and a long study timeline. The good news is that

