How do you fix this aging error on the Sims 2 PC Game?

fosho

New member
I've only got the Sims 2 PC (no expansions), and I use the aging cheat to make my sims older. Like, I do: Ctrl Shift C -> boolProp testingCheatsEnabled true -> shift click on sim -> select "set to birthday."
And it normally works, but this time an error's occurred and when I select set to birthday and try to make this particular sim grow up, instead his age goes back around six days. Are there any ways to fix this, or another non complicated cheat to make a sim go from a teen to an adult?
 
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