Is there anyway we can correct a misaligned of the starteunit ourselves?

I noticed that on my P80 the purple anodised nut has some marks on it(blank metal visible) caused by the metalpart in which the oring resides.
I think this is caused by a(suddenly?)misaligned starterunit.

The engine has approx 3:30 hrs on it. I yet have to check if the oring has worn out but I doubt it.