acoustic treatment problem

Hi, this is my first post and i have to say that this forum is awesome. Also i've to say that my english is terrible, so sorry my mistakes. I'm starting to do the acoustic treatment of my home-studio, putting some bass traps, diffusors, etc. But there a space in the room that i don't know how to treat right. i hope you guys can help me on this. Is the area mark with an X Thanks you all for the time Cheers

One more thing i've forgot to say is that the ceiling hight is not flat. Starts with 2,70 M² (where is the desk), goes at 4 M² (exactly in the problem area) and down at 3,50 M² at the rear wall. Cheers!

Turn the desk 90 degrees to the right.....get that bass filled corner out of your left ear, it will add some balance o your room.