I have had this with a couple pups over the years (non GSD) ... it very low level and by the time they were adults never had an issue and both were long lived. Again, contact breeder... and find out what Level it was from the vet. May not be an issue.
Norse Magic vom Kriegershaus "Rune" (Dec 08)
Kriegershaus Scout vom Haus Rauch (Dec 12)
At the Bridge: Magnus (1998-2010)