The +European Space Agency, ESA didn't communicated about the possible issue or the solutions to fix the problem. However, Josh Byerly from +NASA revealed that the Progress’ stowed antenna that may have caused the damage in the vicinity of the docking area, where are located the ATV’s navigation aids.
Engineers were not able to assess the potential damage on ISS because the area where the reflector is located is not visible from inside the station. Only external cameras of departing spacecraft could take a look to the critical area. In the worst case scenario, ATV carries a backup docking system using telegoniometers that emit laser light at a different wavelength.