Accidentally sketched on wrong layer

What the title says, i accidentally sketched on the base layer but i cant undo the sketch. I can erase the sketch but that would erase the background too and i dont want that. Is there any way to somehow remove the sketch without erasing the background as well? Sorry if it sounds confusing.

What the title says, i accidentally sketched on the base layer but i cant undo the sketch. I can erase the sketch but that would erase the background too and i dont want that. Is there any way to somehow remove the sketch without erasing the background as well? Sorry if it sounds confusing.