That should be quite easy if you are know how to solder and have a soldering iron a some diode, just solder a diode between the start and finish of this trace. I bet the start is the hot swap socket plate that is just on the upper part, for a the end just search a solderable part that is connected to the other end. Even soldering to the copper exposed part of the broken diode should do the trick (the copper on the bottom part).
If you haven't any, use 1N4148 diodes.