Unknown Stain on Vachetta Leather of LV Noe

[BDA GIRL]

Good day,

Could you please provide any advice as to how to remove this unknown stain?
The stain seems to have permeated the leather.
In my inexperience I have tried to remove the stain with baby wipes, soap and water, alcohol, white eraser and unfortunately a dab of acetone. The stain has not budged.
Can this be fixed?

Thanks in advance
BDA Girl