One vape doesn't reset you
A single slip doesn't undo the days of lower intake that came before it. Quitting nicotine is rarely a straight line, and one puff is a moment, not a verdict on the whole taper.
Source: CDC — how to quit smoking
Slips aren't failure
One vape doesn't undo the days of lower intake behind it. What a slip actually costs, and the most useful thing to do in the ten minutes after one.
What to do in the ten minutes after a slip
Right after a slip, the most useful thing is the plainest: notice what led up to it, then get back to your plan for the next puff. No need to analyse it to death or promise yourself anything dramatic — just the next small step.
Source: CDC — how to quit smoking