No more "Sore Back" after Mattress Firmness upgrade!

I seriously can not believe this was never fixed...

So, there's this "Sore Back!" moodlet which your sim has a 10% chance of receiving after sleeping in a cheap bed.
And then there's also the Mattress Firmness upgrade for your bed (requires lvl 8 handiness), which will make your sim feel "like sleeping on a cloud". However, contrary to my understanding of logic, they are not mutually exclusive. Aka you can get them at the same time, from the same sleep, in the same bed. I think it's ridiculous.

Apparently both the available bed upgrades were added in the Tiny Houses patch in January 2020. So they weren't considered from the get-go and I understand that oversights happen, but c'mon... it's been 4 years.

I'm also quite confused that I couldn't find a mod to fix that. I know there's the "Buy a better Mattress" mod by LittleMsSam, but I personally prefered to have this fixed directly, rather than playing with new gameplay features (don't get me wrong, their mod is awesome).

How does this mod work?
I simply added a little test in loot_Wakeup_LowQuality to check if the Mattress Firmness upgrade has been completed. If it has, the 10% chance for the Sore Back will not trigger. Since it's an edit on the Loot Action itself, it should work for every bed that's currently in the game and any that will come in the future.

I haven't tested this, but I'm assuming this mod should be compatible with the "Buy a better Mattress" mod by LittleMsSam, since they didn't override loot_Wakeup_LowQuality.

This mod requires XML Injector.

Credits
- Sims 4 Studio
- rachjo1024 who a year ago made a post about this on r/Sims4 and gave me permission to use their screenshots from the moodlets (so it's in English)
- The Horse Ranch bed you can see in the thumbnail which is my favorite bed in the game and is affected by this oversight