Ghostslayer rites, when you get the rite of dawn does it activate on top of your primal, overwrite it?

me and my new party of ALL BLOOD HUNTERS (picture next time we play) have a question about ghostslayer rites, when you get the rite of dawn does it activate on top of your primal, overwrite it, or do you choose? (Seriously, every order is in the party)You choose which rite when you use it

— Matthew Mercer (@matthewmercer) February 12, 2018