The location of the scratch is very important. In the center its a disaster, on the edge, likely inconsequencal. Halfway out, it will only show up wide open or down a stop or two. Look at any old glass, its full of bubbles and internal defects. They were just expected and certainly had minimal effect on the image.
Is the scratch minor or significant in depth?
If significant in any way, I would send it to the repair department. It "might" cause an unintended effect in the "perfect" shot of the shoot of a lifetime. One where you need all the capabilities of the lens. Sunrise/set perfect light, shooting wide open, light is falling across the front of the lens at an acute angle. Your head is into the capture.
"####, I forgot to stop down to eliminate the flare from the scratch"
Been there - done that in slightly different circumstances.