Retain previous behavior for courses with only failed updates
Retain previous behavior for courses with only failed updates

These get treated as time 0 rather than the initial queue.

WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard