Sometimes we need to remove the actuals from a Primavera P6 schedule and convert it back to a Baseline schedule without any updates. Here are the steps to remove the actuals using the global change in P6.
1- Change All Completed Activities to In Progress using this Global Change.
2-Set Duration % complete to 0 using this global change.
3- Now Set All the Activities to Not Started using this Global Change
4-Run your Schedule on the Project Start date.
5-Now you have a Baseline Schedule without any update.