PVS-Studio warning V519 for Geant4

const G4KineticTrack& G4KineticTrack::operator=(
  const G4KineticTrack& right)
{
  ....
  the4Momentum = right.the4Momentum;
  the4Momentum = right.GetTrackingMomentum();
  ....
}

This suspicious code was found in Geant4 project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'the4Momentum' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 451, 452. g4kinetictrack.cc 452

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/