i have MCCC installed so it's making managing traits easier, but i think it can be done with commands too.
i found that my sim had a "claimed locker" hidden trait, and removed it. once i did that, i could claim another locker. that being said, i'm not sure which lockers are actually functional or if they all are?
sadly, my sims don't seem to have this hidden trait
i tried cheats like "traits.remove_trait HighSchool_Active_ClaimedLocker" or "sims.remove_buff HighSchool_Active_ClaimedLocker" too, but to no avail
ageing my sims up and immediately de-aging them with cheats makes them able to claim a locker again, but i am not sure if this method can cause problems later on, because they get there diploma by aging up
