You have 2 options to add the traits in the game.
However, you should use ONLY 1 OPTION.

1st OPTION
If you want a Primary Trait.;
put in your mods' folder the file named "Primary, CAS Traits" to be visible in the CAS (Create a Sim) menu.

2nd OPTION
If you want a Supplementary Trait;
put the file named "Supplementary Traits" directly into your mods' folder. The Supplementary Traits are not visible in the CAS menu
and can be used as a way to add any of the Traits to any Sim. Furthermore, there are 2 easy ways to do this; first, by clicking swift, clicking on the sim and add the supplementary trait through the EA Cheats Pie Menu. And the 2nd is to download the chingyu_AddTraitsMenu mod to add the trait by clicking on the sim again, click to add the trait and your sim is good to go!

IMPORTANT
If you already have the Primary Traits installed in your sims4 game, and you want to replace them with the supplementary ones, first you should do this;
Either delete the folder that contains the Primary Traits or delete the Primary Traits Packages and then add the "Supplementary Traits"package.
You don't have to give your Sims the personality traits again. The sims that already had the primary traits, now will have the personality trait as a supplementary emptying one slot in your primary sims' traits.

Happy Gaming!

