Same-Sex Couple are now Sisters

Hello since the latest update my two female Sims who are married to each other have full romance bar and a daughter together are tagged as Sisters with an unknown parent in the family tree.

They live together with a dog andone of the Sims brother , sister in law and their two kids so full 8 sism household.

I tried changing it using testingcheats true and cas.fulleditmode but it would not let change me the Sister to householdmember.

Okay i uploaded them ´house to the gallery and made a new save from scratch changed the relationship during CAS put them on a lot but they are still Sisters.

Only thing that helped it breaking the two families into seperates households and have them now again fall in love.

I dont use any mods or CC