Shadow and Bone finishes 2 years before the Six of Crows series starts (I am not sure how long S&B is), so the Crows are 14-15 during the TV show, assuming that the continuity is unchanged (which is likely, considering that Leigh Bardugo was involved in the production). The show seems to forget that numerous times, most blatantly when Inej says the following while practicing her acrobatic act:
I haven't done this since I was fourteen
She was around 14 during those events.
So my question is: Is that a plot hole, or am I missing something really blatant?