@Mark_P The only option I can think of is to move all tasks so far into the future that they won’t go overdue.
Easiest way to do this would be to:
go to timeline view
zoom out far enough that you can see all tasks
select all tasks by dragging a selection rectangle
drag all tasks forward
Try and move it to the same day of the week though, as otherwise tasks may end up planned on non working days.
Doing this with dependency management options (Timeline > Options > Manage dependencies) is also an option, but this would require all the tasks to be connected with dependencies.