Geneticly reuniting my species after Horizon Signal

[redomer]

I recently got through the Horizon Signal event chain and now my species has a subspecies. I modified all of my pops to be as similar as I could. Now there is only the Tomb World Preference that I cannot add to the ones that don't have it or remove it from the ones that have it.

Is there a way to bring them back together or am I stuck with some weirdos?

BTW playing as the Commonwealth of Man. It is imho very strange that only the people of my capital system were changed but no one else.

 

[BlackUmbrellas]

You have two options, I suppose.

Option #1: Purge every non-Tomb World Habitable POP and repopulate using them.
Option #2: Edit your save-game to turn all the POPs without Tomb World Habitability into the branch of the species that does have it.

 

[redomer]

You have two options, I suppose.

Option #1: Purge every non-Tomb World Habitable POP and repopulate using them.
Option #2: Edit your save-game to turn all the POPs without Tomb World Habitability into the branch of the species that does have it.

1. Can't purge either branch because non of them is considered alien. That was the first thing I checked.
2. Yeah. I will have a look into that.