^To be fair, it's not as if continuity errors were unheard of in older novels, before Memory Alpha and Netflix made it easier to check references. There are some doozies here and there. Web of the Romulans
and Double, Double
are both explicitly placed right before or after first-season episodes, and yet have Chekov as navigator and refer to "The Enterprise Incident" as a past event. DS9: Warchild
assumes that the runabouts are Cardassian-made craft that came with the station. Corona
suggests that Spock is nearing his eighties in the TOS era, even though his human mother was clearly younger than that. And so on.