Is it possible to disable column validation programatically?

I am having the same issue as this thread here : SPListDataValidationException in an event receiver on a task list with Overdue tasks.

When I use item.Update();, an exception is thrown "The following error occurred: Microsoft.SharePoint.SPListDataValidationException: List data validation failed. ".

Now I would like to disable the column validation before the item update and then re-enable it after the update.

Is this possible? I cannot find any useful documentation in msdn.