m0useanswered grow question 6 months ago not catastrophic at all. details listed below. Even if it was a photoperiod where the light cycle matters. once is not going to make it freak out.
With autos they can be grown on light schedules that are around 18/6 and still flower, even at 24/0 they will flower.
Autos do not require prolonged darkness to enter bloom they use a different mechanism to bloom, unlike like their photoperiod counterparts that do need uninterrupted darkness for around 12hrs.. This is because in the dark they are making flowering hormones and these hormones are light sensitive, meaning day light cause them to degrade and breakdown. Autos just don't do that. so even having light leaks is ok. where as with photoperiods strains that's asking for big issues like hemi.
Good Luck!