PVS-Studio warning V621 for Geant4

void G4QMDCollision::CalKinematicsOfBinaryCollisions(
  G4double dt )
{
  ....
  G4int id = 0;
  ....
  if ( secs )
  {
    ....
    id++;
    ....
  }
  if ( std::abs ( eini - efin ) < fepse*10 )
    ....
  else
  {
    ....
    for ( G4int i0i = 0 ; i0i < id-1 ; i0i++ )
    {
      theSystem->DeleteParticipant( i0i+n0 );
    }
    ....
  }
  ....
}

This suspicious code was found in Geant4 project by PVS-Studio static code analyzer.
Warning message is:
V621 Consider inspecting the 'for' operator. It's possible that the loop will be executed incorrectly or won't be executed at all. _G4processes-archive g4qmdcollision.cc 228

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