As i worked so much for my clubs, i decided to go back to previous patch.
1- Make sure to have "previous version" enabled on your the sims 4 folders: right click on your the sims 4 folder (standard path is: c:\program (x86)\origin games\ the sims 4), check "previous version" tab, if there is something, you're safe, otherwise you can't go back.
2- In "previous version" tab, right click on the previous version (it should be the 15/11 one), and copy.
3- Paste it somewhere on your disk, it's gonna take a bit..
4- then, rename your CURRENT the sims 4 folder into something like "the sims 4 old".
5- Now, move the folder your just pasted at the same level of "the sims 4 old" folder. (standard path is: c:\program (x86)\origin games)
6- Do not launch the game now, go under document\Electronic Arts\the sims 4\ (this path can be different if you changed the save path) and delete (or rename) the file "gameversion.txt".
7- Now you can launch your the sims 4 from the usual link.
P.S. Origin must be offline, otherwise your game will be patched again.