Help with custom lifespan

So I’m having issues with changing the lifespan of a sim that’s been added to my household. So I have SimPe and use ijagecons hack to alter the lifespans of my sims.

Every existing household I’ve played in has had no issues with this change and I’ve made modifications to their exact age (by days) as recently as this week.

The thing is my sim has just married Malcolm Landgraab and I’ve been able to change my sim’s last name and change their household name to Landgraab but it his age won’t change from the default 29 days. I play really long life spans to I need to change it to 84 days but even after reloading ijagecons it still won’t work.

I’ve tried to look online for any help but I can’t find anything about this, except for maybe alternative mods but I’m worried they will mess up my custom ages.

Does anyone know why this issue might be happening?