Creation Kit doubt

[adude1]

So I've been trying to change a Vanilla NPC follower weight value using the console command, but found out that it wasn't that simple, since its head had a different skin tone.  I tried the "enable" and "disable" command, but a neck gap appeared. Then I tried to change the NPC weight value using Creation kit. I edited the value in the "Traits" section, but  the NPC still looks the same in the game. Am I missing something? Is there something else I should be doing? It's the first time I'm using Creation Kit, so I'm not very familiar with some stuff of the program. Thanks in advance!