The rowMoveSameLevelOnly property disables the possibility to drag Scheduler rows to a different level in the resource hierarchy. When set to true, the rows will be restricted to the same level during drag and drop row moving.
false
dp.rowMoveSameLevelOnly = true;
Event calendar/scheduling AJAX components. Available for JavaScript/HTML5/jQuery, ASP.NET, ASP.NET MVC. Build resource booking, project management, time tracking applications, personal and shared event calendars.