Making changes in the timephased portion of the view causes a conflict with another task
The timephased edit will cause one task to start before another task to which it is linked. As a result, the task link cannot be honored.
Note: Go to Link tasks in a project for additional information.
Using the Planning Wizard, you can:
Keep the timephased edit and ignore the link.
Microsoft Project will keep the changes you made to the timephased portion of the view and ignore the link between the tasks. It will do this by putting a constraint on the task that you're editing.
Ignore the timephased edit.
Project will remove the timephased edit you made and will not change the links or constraints that are applied to the tasks.
If you don't want the Planning Wizard to display this information again, select the Don't tell me about this again check box.