how can I prevent adobe premiere from baking rec709 when render and replacing slog3?

I am finishing a documentary mostly shot on sony xavcHS 422 10 bit uhd in the adobe color managed workflow using slog2.gamut3.cine. It has been edited with proxies, now I need to render and replace all source clips in my timeline in ProresHQ to be able to grade smoothly. But when i hit render and replace using source clips and NOT bake in effects it converts slog3 to rec709 (my timeline setting). As my clips have been shot on different cameras: How can I prevent ALL my clips to change colour space and destroy my colour information so I can grade?