Can't edit pre-existing relationships

Hi sunfloweriv​ 

are you still having issues with this ? Could you provide the info asked in my earlier post ?

Hi sunfloweriv​ 

do you have any other Sims in the household then the original household ?

Can you post a pic of the family tree.

There's a similar thread but at this point I'm unsure if it's the same.

Also are you using mods/cc and on which platform are you playing ?