I'm re-reading the Peter Hamilton Night's Dawn trilogy and am confused at this extract from book 3 (I think each book was in 2 parts in the USA) The Naked God - chapter 8.
Louise and her sister Genevieve have journeyed from an agricultural planet and have never received neural implant fleks until now...
Andy broke the seal in front of her, and took out a small black capsule a couple of centimetres long. He slotted that into the back of a specialist medical implant package. The only other item in the box was a flek.
‘This is the operating didactic, which is standard, but it also contains the first-time access code specific to this set,’ he told her. ‘Basically, it allows you to activate the neural nanonics. After that, you change the code by just thinking of a new one. So even if someone got hold of your flek afterwards it wouldn’t do them any good. Don’t worry, it’s all explained in the didactic.’
She lay face down on the cushioned bench, with a pair of collar wings holding her neck steady. Andy pushed her hair to one side, ready to apply the medical package to the nape of her neck. There was already a tiny nearly healed scar on her skin. He knew exactly what it was, he’d seen it a thousand times before, every time the implant package was taken off.
‘Is everything all right?’ Louise asked.
How did she have the scar?
(I remember being bemused years ago when I read it the first time, this time I've been very careful not to miss out a sentence earlier in the trilogy)