Fix PCA error if probe aggregation (TMART-234)
Fix PCA error if probe aggregation (TMART-234)

UMich-Transmart/Rmodules,thehyve/Rmodules,UMich-Transmart/Rmodules,UMich-Neptune-Transmart/Rmodules,thehyve/heim-Rmodules,wimvanderlinden/Rmodules,wimvanderlinden/Rmodules,UMich-Transmart/Rmodules,transmart/Rmodules,thehyve/Rmodules,baumjamin/Rmodules,wimvanderlinden/Rmodules,transmart/Rmodules,thehyve/Rmodules,cdejonge/Rmodules,thehyve/Rmodules,transmart/Rmodules,thehyve/heim-Rmodules,baumjamin/Rmodules,cdejonge/Rmodules,baumjamin/Rmodules,UMich-Neptune-Transmart/Rmodules,wimvanderlinden/Rmodules,UMich-Neptune-Transmart/Rmodules,transmart/Rmodules,UMich-Neptune-Transmart/Rmodules,cdejonge/Rmodules,thehyve/heim-Rmodules,thehyve/heim-Rmodules,cdejonge/Rmodules,baumjamin/Rmodules,UMich-Transmart/Rmodules