Ran into this issue just recently. Don't know if my resolution will help because not sure if it is the same situation but it might give everyone some ideas.
I had been playing around with Morrigan and making my own face for her, but when I got rid of her default tattoo in the toolset this "Legacy Tattoo" thing showed up in game.
I did notice that when I was removing the tattoo in the toolset it did not have a way to replace the exact one, it wasn't one of the default choices for tattoos, but I was ok with that at the time because I didn't want a tattoo.
The way I fixed it for Morrigan was to grab one of the tattoo resources from the projects here and apply that to her, the writing was gone, and she looked even better.