damage to rear axle shaft

[silky]

A week ago I changed the rear brakes on my 03 Tahoe Z71. Afterwards I noticed an annoying burnt grease smell which I tracked down to the driver side rear wheel. I assumed it was the axle seal so I decided to change the seals/bearings on both sides. My guess was right...the driver side parking brake was covered in gear lube. When I pulled the axles I found some damage on the driver side. There is a thin and rough gouge in the bearing/seal area.

I am attaching a picture.



Do I need to replace the axle? Can I use a "repair bearing"? or is it nothing to worry about?

thanks