fix bug when multiple ARTs with same logical key shdn't happen, but that's another bug for another commit
fix bug when multiple ARTs with same logical key
shdn't happen, but that's another bug for another commit

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