fix cycle bug in R&D schedule
fix cycle bug in R&D schedule

django-rea/nrp,django-rea/nrp,FreedomCoop/valuenetwork,thierrymarianne/valuenetwork,valnet/valuenetwork,FreedomCoop/valuenetwork,simontegg/valuenetwork,FreedomCoop/valuenetwork,valnet/valuenetwork,thierrymarianne/valuenetwork,thierrymarianne/valuenetwork,thierrymarianne/valuenetwork,simontegg/valuenetwork,valnet/valuenetwork,django-rea/nrp,simontegg/valuenetwork,FreedomCoop/valuenetwork,django-rea/nrp,simontegg/valuenetwork,valnet/valuenetwork